My wife has the 600, and as I look at the specs, the biggest difference to us would be the removable battery, that's a way better option then the huge snap on back up battery you can get for it now.

I'm wondering if there will be an upgrade route, since they have an upgrade features list. Unfortunatly, Sprint is currently saying no, but if you have bene a customer for 18 months they will give you the $150 off they give new customers (down to $449 from the $599 list).

C-net is also reporting that you can get them in November from Sprint, but not until sometime next year from anybody else, according to their story

"We will be the only ones with these phones for a while," said John Garcia, senior vice president of sales and distribution for Sprint PCS, speaking at a press conference at the CTIA Wireless IT and Entertainment trade show. "We are very excited about buying a very large quantity of these."

And of course, the cable is different, so any accessories you have now, well just buy all new ones.