They are PCI-E for now, but will have the AGP Versions released end of November, beginning of December, around in that area, right before christmas of course so they can make that money
Like leonidas said though, right now PCI-E isn't fully utilized, but when it becomes standard it'll be twice as fast as AGP 8x
PCI-E are seperate from the PCI slots. they have great difference in speed between those two.
PCI-E motherboards aren't that expensive. it's just that most of them are only for Intel's P4s, not AMD. I think i heard they created amd PCI-E mobos but i ain't sure.