These photos from the FCC show us a few of the new Roku devices coming out in 2011 including the 3000X, 3050X, and 3100X. These guys will have 1080p HDMI, USB support, a microSD slot, and surround sound support. The HD model features an RF remote control.
Two entry-level models, the XS and XD, will not have Ethernet ports.
Look for these this year, probably for launch around the holiday.