The iMacs have been updated to the as high as 3ghz
Woo Hoo! With these new configurations, the iMacs are great production workhorses:

2.4GHz Intel Core 2 Duo, 1GB memory, 250GB hard drive, 8x double-layer SuperDrive, ATI Radeon HD 2400 XT with 128MB memory

2.66GHz Intel Core 2 Duo, 2GB memory, 320GB hard drive, 8x double-layer SuperDrive, ATI Radeon HD 2600 PRO with 256MB memory

2.8GHz Intel Core 2 Duo, 2GB memory, 320GB hard drive, 8x double-layer SuperDrive, ATI Radeon HD 2600 PRO with 256MB memory

3.06GHz Intel Core 2 Duo, 2GB memory, 500GB hard drive, 8x double-layer SuperDrive, NVIDIA GeForce 8800 GS with 512MB memory