I'm in the same boat.
My app started selling in February and so far they own me a couple grand in royalties and not a single penny has been paid to me yet.
I've emailed them at least 4 times and so far with zero responses.
I was planning on adding some useful upgrades to my app to benefit my users but now it's all on hold. I don't think I can do business with a company that refuses to honor legal contracts.
I'm thinking of moving to the Palm Pre platform when it's ready.
