The core cwcheat plugin hasn't been updated for a while.
However you can find the latest databases for cwcheat on some 3rd party sites.
Download cwcheat CWCheat 2.3 Released | Download CWCheat 2.3, PSP Hacks - PSP Slim Hacks
Latest database Biggest CWCheat Database Download (02/26/2012) | TJ's Daily
also you can add your own cheats to the database if i ain't there