Yeah, a lot of people are *****ing at Palm for not including WiFi. I personally don't see a huge need for it, and I'm a heavy Palm user. My Tungsten T3 and my SE T616 get me by just fine.
I'm pretty excited about the 650, I think I'm finally going to consolidate my mobile devices and buy one when the GSM version is released. It fixed the four biggest problems I thought the 600 had: resolution, processor speed, keyboard, and bluetooth. I really couldn't see using any other integrated device, except possibly the Blackberry, but I think it's a bit too large, and I like the app support on the Palm better.