I have heard of many startups trying to tackle this niche. I haven't seen anyone pull it off as gracefully as zetrip (referring especially to the UI as featured on the zetrip.com front page). There is a lot of utility (and thus, profit-potential) in this market, I'm impressed overall and I look forward to seeing the infographic on my fb wall within 24 hrs.
the infograhic is pretty cool.<p><a href="http://zetrip.com/recommendations/landing?u=4015" rel="nofollow">http://zetrip.com/recommendations/landing?u=4015</a><p>but i'm not sure if i'd keep coming back to the site. what's the long term vision?