Well, I'm sat here with a 15" 2.16ghz MBP, gig of ram... and I'm not happy.
First of all, the heat. I poo poo'd the heat issue thinking they can't be that bad, but OMG - I'm sat here typing and I can't keep my hands on the case for that long, it's really that hot.
Next up, all the programs I use on a day to day basis don't work. I've fallen foul of the PowerPC / Intel incompatibility, which I know is my fault - I should of checked versions and compatibility but I really didn't think it would be that much of a problem. Cubase SX, Final Cut Pro.. nothing, won't work. I can't even select run with Rosetta, since the option doesn't appear on the icon!
Apart from that, it seems nice - but apart from looking like a smaller version of the useful 17" Powerbook sat to my right, I'm not happy at all.