U1 sale information:
https://bitcointalk.org/index.php?topic=380946.0

cgminer:
https://github.com/AntMiner/AntGen1/tree/master/cgminer

Source code for cgminer:
https://github.com/bitmaintech/cgminer

user guide:
https://github.com/AntMiner/AntGen1/blob/master/manual/AntMiner-U1%20user%20guide.pdf