Don't give up. :-)
There are pretty much things one can overlook. Let me mention two of my friends. Both complained that the board is non functioning. For the first it turned out, that he tried to use a 4x CD-ROM from the jurassic, and a 200Mb(!) HDD. (Most probably from Noah's PC store) When he bought a new CD-ROM and a more moden HDD it worked.
For the second it turned out however that it broke in transit... Genesi replaced the broken board though, so you lose nothing, except time.
For me, at first I tried the board with only a CD-ROM which turned out to be just too little for the ATX PSU of the house. When I added the HDD it magically started.
So don't give up, it's just a computer :-)
(I have to mention, that despite the Pegasos is available as Prebuilt systems, most of us purchased the mobo only - so we get what we deserve... :-))