A feature that has been in ZBrush for sometime now, known as ZAppLink, has made it's way into Blender. Given how crappy the Blender paint tools can be when you want to do anything more than large blocks of flat colour, this is a god-send.
Anyhow, if you're interested in seing the feature in action (even if it is "programmer art"), take a look at the Durian Blog entry. ZBrush can do it (much) better, but I know there are some of us out there that either cannot afford ZBrush that would find this very useful.

