No accepted shares on cgminer (sync issue ?) I don't really understand how cgminer works.
I try to mine using cgminer + cgwatcher on a BtcGuild pool but even after 1 hour mining I don't have any accepted or share block. What I don't understand is how cgminer sync with the current blockchain data??? Blockchain data is about 11Go. Should I find blk0001.DAT file in cgminer folder or Roaming folder?
Is it possible to keep miner tool (on a USB key) and keep data on the same USB key.

Thanx
CGMiner does not need to sync with the blockchain, the pool does. The pool keeps a copy of the blockchain and only sends you the block that is currently being mined. If you don't see any share on BTCGuild's website, you should check that your miner's username and password are correct (they can be different from your main username and password). If you see shares, but they are constantly rejected, then you have a connection problem between you and the pool server. If this is the case, try changing to another pool.