Although i'm not a big fan of simplicity in websites (websites which are properly designed are much more appealing to me) and i think it has a major impact on the 1st impression the visitors get when they visit your site - you could still pull it off. You'll need a certain buzz and very good content to appeal visitors.
It is definitely too simple for my taste... You should get some sort of header and footer to give the page an architecture. Also some colour differentiation would be good.