Roku revamped their entire line of streaming boxes. They have the Roku HD, Roku XD, and the Roku XD|S. You can find a comparison chart of the 3 models here. The starting price is $60 and offers HD. I didn’t think it was smart to launch a SD box last time they redid their lineup.
Engadget reviewed the XD|S model and gave it good marks. It’s an even better value since Hulu Plus will be coming. They still haven’t given me enough reason to upgrade my two first generation Roku boxes.