Our experience with Wimdu: we found out about the site well before we found out who the Samwer brothers are and what they do (namely, rip off big sites). We accordingly signed up because hey, more exposure can't be a bad thing, right?

Wimdu failed to cross-check our presence when they gave their telemarketing list to what sounded like kids in dorm rooms robocalling us - day after day after day and sometimes three times per day - until they finally gave up (more likely) or finally got the message that we had already listed ourselves on their site. Whatever Airbnb did where they emailed people via Craigslist has absolutely nothing on the obnoxiousness of Wimdu, they're just lesser news.