I've been building the Maya plug-in for Maya 6, as only a Maya 5 binary is included in the download.
I've had to patch up the code a lot to get it to build under .NET 2003.
The main change is that every use of xmlGetProp() requires a cast to (const xmlChar *) on the second element,
xmlGetProp( source, (const xmlChar *)COLLADA_PROFILE_PROPERTY )
I also get a lot of comparison signed/unsigned mismatch warnings and a load of float/double warnings.
But with the errors fixed and the warnings ignored, it does all seem to work.
Maybe these build problems could be fixed up before the next release.