The subject mostly says it.

I have a C++ QtScript plugin (it binds TelepathyQt4) and was thinking about writing a plasma chat client with it. But I'd have to write it in C++ if I can't use a qtscript plugin (which appears to be the case).

Ok, so I broke down and joined plasma-devel.
http://mail.kde.org/pipermail/plasma-de ... 09014.html