Hi everyone, I decided to bypass code signing in order to test software on an actual device, the method I've used is altering the iPhoneOS platform plists and creating a custom self signing certificate, which works perfectly -- software compiles and runs on my jail broken iPad.
However, I've noticed that the app cannot store and retrieve data from the iPhoneOS keychain, which makes me think that bypassing code signing has something to do with it.

Has anyone else experienced this?

OK, solved. I didn't have any entitlements so encryption-related functions were a no-no for me
Solved using the nifty gen_entitlements.py script

As I understand, you develop for iphone os 3 and without IDP membership. If I am correct, would you care to make detailed How to?
I am also looking how to test apps on iphone. As I am just learning, don't want to buy membership yet.