I think the upcoming Inspiron Zino HD could make a great MythTV back/frontend.
Coming with Ubuntu, up to 8GB RAM and a 1TB internal drive, the units have AMD processors with AMD graphics. My problem would be the graphics driver – I’ve no idea if the free drivers will support it, but in my experience AMD’s proprietary driver on 64bit machines is absolute rubbish.
Nevertheless, it looks like a cool little box:
In every case, the Inspiron Zino HD includes wireless networking (802.11b/g or 802.11a/b/g/n), four USB 2.0 connectors (two front, two rear), audio I/O (microphone, line, and headphones), a four-in-one memory card reader, and gigabit Ethernet. The device’s rear panel (below) also includes a VGA output in addition to the HDMI port, plus two eSATA connectors for external hard disk drives, says Dell.
Of course, they’re not going to sell it with Linux in Australia, right? *Sigh*