Odd because performance has generally been OK and that I haven't installed anything new.

Optimized using Onyx and looked for virii using ClamX (none found).

Guess I'll have to wipe the system drive and reinstall the OS, etc. Any tips on how to do this with little pain? Of particular interest would be any tips on preserving iTunes, iPhoto and iMovie libraries while completing a fresh install of the underlying OS/apps.

Thanks.