Apple quitely upgraded Mac Mini today. These new models come with a processor upgrade (1.83 GHz for the entry model and 2.0 GHz for the "better" model). Also, 1 GB of RAM is now standard, the hard drive has now a bigger capacity (80 GB or 120 GB), a GMA 950 is included. The upgraded iLife (version '08) comes bundled with this new model.
The price remains the same: $599 for the first model and $799 for the second one.