The most interesting is the Firestone (above), which is the successor to the Touch HD, and runs a 3.6-inch WVGA display, 600MHz processor and Windows Mobile 6.5.
There's also the Thoth, which is the successor to the Athena, which was a UMPC-like, Windows Mobile-running mini PC. This version will also use WM 6.5 on a 1000MHz processor. Jump over to WMPowerUser to see the rest. [WMPowerUser]