Colin Sharp from Toolfarm sent me this great read - Art of Roto by Matt Silverman, developer of AE plug-in Color Theory . This is an indepth article on the history of rotoscoping - from Popeye to Snow White - and a summary of roto tools and programs, including lots of screen shots.

There's a tip in the article: Red Giant software offers a Commotion to AE roto import plug-in.