Hi,
I write an iOS client for bitcoin.
Core code is open source now, at https://github.com/fingster/BTC-Express

BTC Express is the first iOS thin client for Bitcoin transactions.
BTC Express can connect you to the bitcoin network in a second without downloading any blocks or headers. Once connected, you can do transactions immediately!
Features
Quickly and easily get up and running on bitcoin network.
Show balance of btc in your wallet on iPhone.
Do transactions with any other peer running Mac, Windows or Linux, etc.
Sending and receiving of Bitcoin via Bitcoin URLs.
Backup your wallet to your secure email.

I want to be out of here in order to discuss with other developers and users.