Apple has released the first Intel-based Mac minis. According to MacMerc:

The new Mac mini is now up to four times faster with the Intel Core Duo, includes even greater expansion in the same incredibly compact design, and is the most affordable way to enjoy Front Row and iLife ‘06.

The 1.66GHz Intel Core Duo (dual-core) Mac mini is available starting at $799 and the 1.5GHz Intel Core Solo (single-core) Mac mini is available starting at $599.