When I upgraded to OL2007, Buck's great little macros stopped working.  Today, I finally got the guts to ask the Outlook guys what they broke improved.  The answer was simple enough.  I'll let the code do the talking:

Sub LinkToWorkItem()
    Set oDoc = ActiveInspector.WordEditor
    Set oWord = oDoc.Application
    Set oSelection = oWord.Selection

    '' Convert the current selection to a work item hyperlink'
    oDoc.Hyperlinks.Add Anchor:=oSelection.Range, Address:= _
    "http://tfserver:8080/WorkItemTracking/Workitem.aspx?artifactMoniker=" _
    & oSelection.Text, _
    SubAddress:="", ScreenTip:="", TextToDisplay:=oSelection.Text

End Sub

Sub LinkToKB()
    Set oDoc = ActiveInspector.WordEditor
    Set oWord = oDoc.Application
    Set oSelection = oWord.Selection

    '' Convert the current selection to a KB article hyperlink'
    oDoc.Hyperlinks.Add Anchor:=oSelection.Range, Address:= _
    "http://support.microsoft.com/kb/" _
    & oSelection.Text, _
    SubAddress:="", ScreenTip:="", TextToDisplay:=oSelection.Text
End Sub

Sub LinkToChangeset()
    Set oDoc = ActiveInspector.WordEditor
    Set oWord = oDoc.Application
    Set oSelection = oWord.Selection

    '' Convert the current selection to a changeset hyperlink'
    oDoc.Hyperlinks.Add Anchor:=oSelection.Range, Address:= _
    "http://tfserver:8080/VersionControl/VersionControl/Changeset.aspx?artifactMoniker=" _
    & oSelection.Text, _
    SubAddress:="", ScreenTip:="", TextToDisplay:=oSelection.Text
End Sub

LinkToKB() technically doesn't have anything to do with TFS, but I went ahead and added it while I was playing with Outlook macros.  
In the next post, you'll see why...