There has been multiple bricked devices already, all after partitioning SD in CWM. The device suddenly turns off while the partitioning is in progress, and never turns on again. We do not know what causes this issue yet, but I am sure that ClockworkMod team will look into it.
New ClockworkMod 184.108.40.206 and ROM Manager 220.127.116.11 are out! There has been multiple confirmations of the problem being fixed, but also ONE brick. So take the fix with a grain of salt.