I'm typing this on my new 20" iMac and I love it. Picked it up at the local Apple Store. They are not yet on display. Evidently they were not allowed to sell them until the press conference was over. I got the education discount ($100 off $1499 model, $50 off $169 Applecare, and iPod rebate). I really like the black border. I was unsure about it at first but it really makes the screen stand out, almost float, and completely hides the camera. As for the glossy screen, looks very bright and vibrant to me. Looks great unless I turn it so that the window is directly in front of it and then it's only slightly more reflective than my previous monitor. I like the keyboard as well. It has a very soft feel and it very comfortable to type on. The best $1400 I ever spent on a computer.
I would have liked to get 2gb RAM. I understand that 1gb is enough for most consumers but it can't be that expensive. Don't mind too much, Apple's RAM upgrade prices are so high, I was planning on upgrading it myself anyway.
Not sure how I feel about the video card. I would have liked to see something with a little more 3D power, 8600 like the MBP, at least. I think the 2600 is fine for me now but I kept my last Mac for 4 years and was hoping this one would last that long as well. On the other hand, I really like that they choose a card with hardware decoders for video. This Mac will double as our TV in the bedroom and we watch a lot of TV and videos on it. Dedicated H264/MPEG/Divx decoder will come in real handy.
Just my 2 cents. I encourage everyone to take a look at it in person if you can, I found it to be much more impressive in person than I did watching the live coverage this afternoon.