I hope they'll make it WiFi and optional...I never bother with WiFi for the Iliad because I just plug it into the router for updates and transfer things by cable from my computer (I don't do it that often after all) or directly by cardreader to the SD card...
We should know more soon, but I think a lot of things could go wrong with the Kindle and we'll just have to wait and see whether they do or not...
Having the OPTION of buying things directly from inside the Kindle would be cool however...since it would mean prople who don't own o use a computer could also be brought on board, but here in Germany Wifi hotspots that are few and far between and the one that are available are very expensive...and having some kind of "mobile-phone-network" thingy going on does not sound like a very good idea to me either because it's sure to cost more money...and I for one am not made of money...