After 10 minutes of research I've found this blog entry describing how the AssemblyVersion build and revision numbers are determined if you use the
<Assembly: AssemblyVersion("1.0.*")>
<Assembly: AssemblyFileVersion("1.0.*")>
It seems that build is the number of days since a predetermined date (controlled by a windows registry setting and by default Jan 1, 200) and revision is the number of seconds since midnight.
I've started displaying this information on some internal web pages so I can track what build/revision of various DLLs were in place when an error occurred.
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I rediscovered www.codeplex.com today. I have several utilities that I wrote that I think I will post out here, starting with my jChart charting library. I've installed TortoiseSVN and SVNBridge and am now looking at how these tools are used.