I've been waiting for a 20" 64-bit Intel iMac since the Intel transition was announced. The fact that it's gonna be 3" bigger is just that much better. This has the potential to be one of the best future-proofed buys in the iMac line; I'm hoping to get 4-6 years out of it. I' think a 1799 USD price-point with the edu discount seems about right, is that realistic?
A Conroe would've been nice; I must admit I was a little bummed when i heard it was going to be another laptop chip. After reading most of the thread on the main page though, I feel like this will be less of a concern. I hadn't realized how hot the conroe runs, and that the performance difference will be fairly minimal in most day-to-day circumstances. Also a cooler chip may help the components last longer (a major plus for me).
Here's hoping we get the option of a decent graphics card. Does it really cost that much more to design a motherboard that accommodates a larger variety of GPU's, or to accommodate a larger BTO GPU variety during the assembly process? Come on Apple, charge us your premium if you want, at least give us the option to overpay for a nicer GPU.
As far as a "headless" Mac between the mini and pro lines, I can see the gap that people describe in the product lineup. I just wonder how large the market is, and if adding a new line of desktops (and the added cost of the R&D/advertising/inventory etc.) is truly the solution. It seems that this gap may be more efficiently closed by improving the mini (possibly redesigning it), adding a dumbed-down Mac pro (i.e. 1 dual-core), and increasing the BTO options on the iMac. My two cents.