My understanding is that for a while there won't be any motheboards available for these that support AGP - they are targeted at the server market.
Toms Hardware has a review up on them. Interesting product and super powerful for what it's running at and what it costs. Not so good for gaming, though, but if this beast has the headroom for clockspeed increases, AMD well could have another winner on their hands.
Good for AMD - keep the pressure on Intel, and hopefully this helps them get out of the red. I would have liked to have seen the chip priced a little higher myself. Since it's competing in the server space, the chips can be priced a more than what is acceptable in the desktop space, not to mention that some admins may avoid these, citing the old 'it doesn't cost much, so it must not be reliable' argument (which is perfectly valid when you are working with 24x7 systems).