Blender is basically the most amazing modelling and animation package, bar none. At the Machinimatrix site, Gaia Clary uses Blender to create some very cool sculpties and writes/records top quality tutorials. This is probably my favourite place for sculpty tutorials.
Of course, before you go doing any sculptying in Blender, you’ll need the PrimStar plugin: http://dominodesigns.info/
This is another resource that I have used and learned a lot from, the BlenderSL channel on youtube: http://www.youtube.com/user/BlenderSL#p/u
Need to make a sculptmap transparent or water mark it? Try this:
In fact all of Robyn Huffaker’s site contains great Blender and Sculpty Information.