In a list, you can create a field of type "Person or Group" and set the "Show data" option to "Name (with presence)".  When the field displays the user's name, it shows the Office Communicator presence "globe" to the left of the name.

If you use SharePoint Designer (SPD) to convert a List View to an XSLT Data View, fields that display as "Name (with presence)" do not display correctly.  Instead you see HTML tags that would display the name with the presence globe.

You can fix this by switching the SPD view to the Code (or Split) view.  Find the XSL code that will display the name field:

<!--PM Responsible--><TD Class="{$IDAEHOAF}"><span><xsl:value-of select="@PM_x0020_Responsible" /></span></TD>

In the xsl:value-of tag, add disable-output-escaping="yes":

<!--PM Responsible--><TD Class="{$IDAEHOAF}"><span><xsl:value-of disable-output-escaping="yes" select="@PM_x0020_Responsible" /></span></TD>

SPD adds this attribute for some fields, but not all.  You need it for any field that may be rendered by Sharepoint as HTML.

I've found that disable-output-escaping also needs to be added for lookup fields.  Values in lookup fields are rendered as hyperlinks to the list item in the lookup list.  If the value in the lookup field contains special HTML characters (such as &), they are rendered as the "escaped" representation (such as &amp;).  For example, the value "T&M" would display as "T&amp;M" unless disable-output-escaping is added.