Fair enough - I got the CHA-10 cos it's compatible with my phone (T610) but I've never used it. It's actually more of a pain in the arse than using the regular phone buttons...
Octavious is wrong here... CHA-10 is "moddable" the same way as CHA-01, and Spiv's driver source (that's where all other drivers derive from AFAIK) supports both of them.