http://www.amazon.com/SKYTEX-Skypad-...cm_rdp_product

This is more like a N810 competitor, since there is no phone involved, but it looks like a really cool device for the money.
It's been rooted and stuff, so there is full access to the Android market.

The screen resolution kind of sucks, the CPU is a bit slow, at 'only' 800 mhz, and it has no GPS or HDMI. But 150 bucks is not bad at all..