The Parallella board on Kickstarter (supercomputer for everyone)
The Parallella board has a dual-core ARM A9, a 16(or 64)-core Epiphany accelerator chip and costs $99 for the 16-core version. The ARM chip runs Ubuntu and talks to the 16-core chip to speed things up. They've raised $620k out of the $750k goal and some help from you folks could push it past the mark (they've got just under 30 hours to go!).