libc6 is LGPL, gtk+ is LGPL, libhildon is LGPL. I could keep digging through the copyrights in my doc directory in the SDK, but I think I'll leave that as an exercise to the reader. Anyways, Skype, Rhapsody, and Gizmo all seem to be closed sourced apps integrated fairly tightly into Hildon/Maemo, so I think you'd be fine. You could publish your software under a "no redistribution, no commercial use" license. Doesn't Creative Commons have something like that?

And it's not like Nokia isn't playing fair with GPLed software. They actually have a pretty good record for contributing things back to the community (work on bluez, the whole hildon libs).

Also,
"Never attribute to malice that which is adequately explained by stupidity."

Anyways, these sound like issues you should take up with Nokia. At least you'll have a chance of getting the attention of someone in a position to do something about all this...

-John