The site genre definitely has potential, don't get discouraged, get determined.
Out of curiosity, was this a domain you bought that had previous content? Was this the original content and concept of the site?
I ask because it obviously had some serious links at one time to have enjoyed that
PR level.
Get some content and links and you'll be up there again in no time. However, time is of the essence if you wish to attempt to maintain some of its
PR value. Google now show zero links to the site which will degradate your
PR this fall or whenever the next update is launched.
Once you get some content and the structure fixed, be sure to get some free critique and reviews from the WPW Peer Power. Also, when it's ready, let me know and I'll give you a link over at Heres1.com for the big whopping price of Free.
Good Luck and Happy Ranking!
w®m