Intro:
Im somewhat confused about the different approaches to iPhone development.

My goal is to build an app that I can release through Cydia.

I am currently using Xcode and the template javacom has provided. Ideally I would like to use Interface Builder instead of hand coding all aspects of the UI.

Questions:

When I build a pwned ViewBased or Window-Based Application, it creates a folder in mobile/Library/(hash)/myapp.app,
How do I distribute it to my other phone?

I tried tar'ing it up and scping it over. This failed with the following message in syslog:
SpringBoard[70]: MobileInstallationCopySignerIdentityTrust: Could not lookup trust state for specified identity

I tried removing the CodeResources and resigning with ldid, which also failed.
Do all phones running the application need a patched mobileinstallation?

Can I create an xib, then compile it with ibtool into a nib and include it the pwned Window-Based Application?

Thanks

I figured it out. You can start with a View based app and modify it adding other views to it. I can use IB.

I then made a script to scp the Release directory to my device.