Following are some of the moss 2007 links which are really helpful to every one.

http://www.microsoft.com/sharepoint/prodinfo/what.mspx - What is Sharepoint first of all?

http://www.microsoft.com/downloads/details.aspx?familyid=771aeb45-9d27-4d1f-acd1-9b950637d64e&displaylang=en 2007 Office System Document: Developer Posters

http://www.microsoft.com/downloads/details.aspx?FamilyID=14c6b1c1-ad26-4ed0-87b8-b691ebdd9662&displaylang=en 2007 Office System Document: 2007 Office System Logical Architecture Diagram

http://blogs.msdn.com/ifilter/archive/2007/05/10/long-awaited-64-bit-pdf-ifilter-finally-available.aspx  Long awaited 64-bit PDF IFilter finally available.

http://www.foxitsoftware.com/pdf/ifilter/  Foxit PDF IFilter

http://office.microsoft.com/en-us/sharepointserver/HA102147321033.aspx Role-Based Templates for SharePoint My Sites

http://www.microsoft.com/downloads/details.aspx?FamilyID=8248ab85-3ef7-4dd2-a5a6-2615683f6f6d&DisplayLang=en SharePoint Server 2007 Document: Role-Based Templates for SharePoint My Sites — Under the Hood

http://www.microsoft.com/sharepoint/capabilities/portals/overview.mspx Microsoft Portals

http://www.microsoft.com/sharepoint/prodinfo/features/features.mspx Microsoft Features at galance

http://wss.collutions.com/pages/WSS%20v3%20FAQ.aspx

http://support.microsoft.com/kb/896593/  After you migrate a user from a different Active Directory domain, the user can no longer access Windows SharePoint Services

http://support.microsoft.com/kb/934525 Description of the security update for Windows SharePoint Services 3.0

Service Pack 1 Resource Center: http://technet.microsoft.com/en-us/office/sharepointserver/bb735839.aspx

WSS 3.0 SP1: http://www.microsoft.com/downloads/details.aspx?FamilyId=4191A531-A2E9-45E4-B71E-5B0B17108BD2&displaylang=enMicrosoft Office Servers 2007 SP1: http://www.microsoft.com/downloads/details.aspx?FamilyId=AD59175C-AD6A-4027-8C2F-DB25322F791B&displaylang=en 
If you are running Language Packs there are also updates for 32-bit and 64-bit versions:

32-bit: http://www.microsoft.com/downloads/details.aspx?FamilyID=3A6C26FD-0BEB-40D5-8CBA-15164FAAB150&displayLang=en
 64-bit: http://www.microsoft.com/downloads/details.aspx?FamilyID=56681742-7D2C-4A6F-9178-DACD32AADC6C&displayLang=en

http://support.microsoft.com/default.aspx?scid=kb;EN-US;934790 Description of the Windows SharePoint Services 3.0 hotfix package

http://support.microsoft.com/default.aspx?scid=kb;en-us;935504&sd=rss&spid=11373 Error message when you click New to create a new item in a list or when you click an existing item in SharePoint Server 2007

http://support.microsoft.com/kb/934838 How to change service accounts and service account passwords in SharePoint Server 2007 and in Windows SharePoint Services 3.0

http://support.microsoft.com/?id=910444 SSL Termination and ASP.NET

http://office.microsoft.com/en-us/sharepointserver/HA102500981033.aspx?pid=CH100305441033 Demo Enterprise Content Management with SharePoint Server 2007 - SharePoint Server - Microsoft Office Online

http://blogs.msdn.com/sharepoint/archive/2007/11/29/preview-into-wss-3-0-sp1-and-sharepoint-server-2007-sp1.aspx Microsoft SharePoint Products and Technologies Team Blog  Preview into WSS 3.0 SP1 and SharePoint Server 2007 SP1

 http://officebeta.iponet.net/en-us/help/HA101639811033.aspx Administrator documentation for Office SharePoint Server 2007 Beta 2 - Help and How-to - Microsoft Office Online

http://msdn2.microsoft.com/en-us/library/ms550992.aspx Welcome to the Microsoft Office SharePoint Server 2007 SDK

 http://office.microsoft.com/en-us/help/HA101639821033.aspx?pid=CL100605171033  Supplemental documentation for Office SharePoint Server - Help and How-to - Microsoft Office Online

 http://msdn2.microsoft.com/en-us/office/aa905503.aspx SharePoint Server

http://blogs.msdn.com/dszabo/archive/2007/09/07/performance-issues-with-a-list-in-moss-2007.aspx David Szabo's [MSFT] blog  Performance issues with a list in MOSS 2007

http://markharrison.co.uk/blog/2006/08/administrator-documentation-for-moss.htm Mark Harrison Administrator documentation for MOSS 2007 - WSS v3

  http://blogs.msdn.com/sharepoint/archive/2007/04/10/debugger-feature-for-sharepoint.aspx Microsoft SharePoint Products and Technologies Team Blog  Debugger Feature for SharePoint

 http://weblogs.asp.net/soever/archive/2006/10/10/MOSS-2007-_2D00_-Search-only-in-Enterprise-CAL_3F00_.aspx MOSS 2007 - Search only in Enterprise CAL - Serge van den Oever [Macaw]

 http://technet2.microsoft.com/Office/en-us/library/188f006d-aa66-4784-a65b-a31822aa13f71033.mspx?mfr=true Stsadm command-line tool (Office SharePoint Server)

http://stsadm.blogspot.com/2007/08/stsadm-commands_09.html STSADM Custom Extensions STSADM Commands 

http://msdn2.microsoft.com/en-us/library/bb330848.aspx Setting Up a Development Environment for the 2007 Microsoft Office System

http://technet2.microsoft.com/Office/en-us/library/f484f5f2-35bb-4d70-bf56-dd1c4c287c721033.mspx?mfr=true Deploy software updates for Office SharePoint Server 2007

 http://www.microsoft.com/downloads/details.aspx?familyid=a2f225fd-dfb8-4e2a-b0b5-2facd681541f&displaylang=en Download details 2007 Office System Sample Setting Up a Development Environment

 http://blogs.msdn.com/maximeb/archive/2007/10/27/missing-content-types-association-with-variations-an-stsadm-extension-solution.aspx Maxime Bombardier - SharePoint Architecture & Development  Missing Content Types association with variations - an STSADM exten

 http://software.sharepointsolutions.com/support/knowledge/spa/Pages/default.aspx Site Provisioning Assistant Product Support Knowledge Base

http://office.microsoft.com/en-us/sharepointdesigner/HA101656311033.aspx Microsoft Office SharePoint Designer 2007 product overview - SharePoint Designer - Microsoft Office Online 

http://msmvps.com/blogs/shane/archive/2006/10/02/Upgrading-from-SPS-2003-to-MOSS-2007-Beta2-TR-using-the-gradual-approach.aspx Upgrading from SPS 2003 to MOSS 2007 Beta2 TR using the gradual approach

http://www.sharepointblogs.com/spsherm/archive/2007/08/21/improving-performance-blobcache.aspx Improving Performance BlobCache - SPSherm.MyBlog

All The Best!!!