Shuttle has recently announce its SG33G5 barebone a first G33 barebone with HDMI and VGA out. This machine is available for just about €310 including VAT and it will be interesting to try Intel's new graphic core and HDMI capabilities.
This small machine also supports all FSB 1333 processors all the current Core 2 Duo and Quad processors including the upcoming Penryn 45 nm processors.
It comes in black in shuttles well known small form factor (SFF) and it also supports Dolby Digital Live and DTS Connect, and great overclocking abilities.
It supports up to 4 GB memory in dual channel, 1 PCIe 16X, Gigabit LAN, 2 times Firewire and 6 USB 2.0, 3X SATA 2 and 2X eSATA, 8 channel audio with Dolby® Digital Live! and DTS® Connect, DirectX 8 ready Intel GMA 3100 graphic with HDMI including HDCP and comes with 250W PSU. It is 310(L) x 200(W) x 185(H) mm small.
If you are convinced you can get one here.