HI. finnaly. I think we both add the same idea, integrating several actions into the same widget.
http://talk.maemo.org/showthread.php?t=70305 (I did it in python...)

I like your's better.
One other VERY Interesting and usable 'thing' I'dd like to add was FMcarKit. But the developer has never answerd me and the source code is not available. I do have an earlier source code versions but I can't tell if they are the working ones.

I also see that you're doing-it in C(or c+++++++) so, if you need anything from me (I did a kind of homework while investigating) I'll be happy to share the code (you would have to adapt).
I aslo tryed to overcome the 8 Char limitation on the RDS Station name by "tickering" the strings sent do RDS, unfortunantly my python threads knowllege was not that good (but it works in theory).

Thanks