Yea OZ looks great but it suxxxx major.. you always get disconnected, it's hard to connect, it's slow and it uses SMS.
I only have one solution for you buddy.. YAK-ON! That's right your heard me YaK-On! lol
oh yea and you only have to pay a one time fee of $20.. if you want you can try ramble IM for free but it's not that very stable for me.