Somebody has tried, but this somebody has been a lousy C++ coder (me).
I have been running into problems because the VS2008 implementation of some STL containers (used by the Panda3D classes plist, pmap, etc.) has changed in bitlength, compared to VS2005. So you would have to recompile (most?) dependencies too. This is where I have given up, and reinstalled VS2005.
enn0x