Great time for them to IPO and cash out while the stock market is still rewarding .com businesses with an infinite earnings multiple. Things look very rosy now but let's not forget that they rely ENTIRELY on the whims of search engine rankings...And history has shown time and again that relying solely on Google/Yahoo search traffic is not the best strategy.
Not trying to throw a wet-blanket on the founders/insiders/VCs who made a load from the IPO and built a decent coupon site that actually works, but anyone buying the stock today would be idiotic. I'm worried about how this business looks 3 or 5 or 7 years from now and it wouldn't be a surprise to me if they lose their ranking to someone else.