We put a password on a guy's iPhone when he left it on charge in my office...
he ended up locking it
Be patient or just stick it in dfu mode and restore / resync/ load backup.
9512 or 9514 that would be an easy pattern if its a sliding password
Do you have access to the computer you last plugged it into? You shouldn't need itunes on it, just connecting it in should remove the lock xD
It should ^.^
And O.o you've never plugged your iPhone in since?