This may be of interest to you, if you have (access to) XFrog, 3D Studio Max or Maya:
**100 FREE XFrog plants for download on the Autodesk website!
**(I found out while "googling" and accidently got into a Sketchup forum).

Link:
http://seek.autodesk.com/search.htm?q=xfrog&resetft=true&startIndex=0

• downoad either the "Max" or "Maya" zipfiles, they contain the .xfr files and TIFF textures as well.
  There may be other files of interest, personally I'm only interested in the xfr models and the textures.

If you can use the files it's a fantastic offer.
For use with Vue, export the models to .3ds, .obj or .lwo.

Have fun!

• Lars "bigbraader"