biztravel is mostly intended so that I could dogfood StackExchange (<a href="http://stackexchange.com" rel="nofollow">http://stackexchange.com</a>), which is our white label version of the code that runs StackOverflow.com. StackExchange is currently in invite-only beta. I didn't really expect to get a critical mass of road warriors on that site since I'm not planning to spend very much effort promoting it, but I am interested to see how small a StackOverflow-like knowledge exchange site can be and still get enough traffic to work.<p>Someone, I'm sure, will take travel Q&A far more seriously than I did, and get someone like Rick Steves or a big travel site like Orbitz or TripAdvisor behind it, and that'll be huge. Either way I'm pretty confident that Jeff Atwood's goal of having knowledge exchanges like StackOverflow replace crappy old PHPBB sites everywhere on the Internet is pretty much inevitable and this will be a huge opportunity to create new communities where old entrenched ones used to be locked in.