The Ocean did a lot of interesting things, it was a GREAT phone when it was brand new, but that was so long ago now, and that's still Helio's flagship phone. I don't think the phone has recieved a single firmware update over its entire lifetime... it needs one pretty desperately. That was my phone before my TP.

S2U2 should support full screen caller ID, if you use their slide-to-answer.
Pocketshield, too -- full screen caller ID as long as you use its built in side-to-answer. I rather like pocketshield so it's probably worth looking in to.

Something I noticed about the full screen caller ID though, it seemed to add a little more delay in the ringer.