(Not in my native Windows environment anyway.)
I have a few spare moments at work right now. I've got Windows Server 2003 x64 with a local installation of SharePoint as my development environment. (You can debate the merits of this v. using a VM, but I prefer to have direct access to my hardware.) I wanted to check out the VS extensions, so I can quickly do "one-offs" instead of creating full solutions everytime.
I downloaded the extension which can be found here. Tried to install, and boom!
"This product cannot be installed on 64-bit versions of Windows." [OK]
What! No! Not OK. Some digging, and reading the comments on the SharePoint Team Blog, I came across this post: http://blogs.msdn.com/mattbremer/archive/2008/06/17/why-do-visual-studio-extensions-for-wss-3-0-not-support-64-bit-platforms.aspx
Heavy sigh... time to take a closer look at Ted Pattison Group's STSDEV...