I picked up the mini today (2.53, 4 GB RAM, 320 GB HDD) -- I had purchased the previous gen. 2.26 less than 2 weeks ago, and Apple was kind of enough to take it back without a restocking fee. I'm impressed with the speed. I have a 2.66 MacBook Pro, and can hardly tell a difference. Both have 4 GB of RAM, most intense app I use is Photoshop. The ONLY downside is the fan seems to run _slightly_ louder, but I still have to put my head near it to notice. Idle temp seems to be around 44C, whereas the previous always sat around 40C.