The IRex DR 800SG is a wireless e-reader - with worldwide 3G support and unlimited 3G in the US via Verizon. It's got 2Gb of memory and memory card expansion.
IREX say that the reader has the fastest page refresh. It supports B&N eBook Store and open platforms such as PDF and ePub (and others). IT costs 399$ and will be available on October 2009 in Best Buy stores, and will reach Europe in the 2nd half or 2009.