One of ThinkSecrets's sources claim he has received a 1.5GHz Mac mini on Tuesday, although the box still says "1.42GHz".
The new Mac mini is designated PowerMac10,2 following the previous model's PowerMac10,1 designation. It also features an updated Boot ROOM version, 4.9.4f0 from 4.8.9f4.The Mac mini with SuperDrive now features a 8x dual-layer SuperdDrive from Matshita which burns 5x DVD RAM along with 8x DVD+/-R support, 4x DVD+/-RW support, and 24x CD-R Support.
The mini's ATI Radeon 9200 also got a small update to 64MB memory but it's still not able to run Mac OS X 10.4 Tiger's Core Image technology.
Lastly, the new Mac minis add support for Bluetooth 2.0+EDR.