I think it will be interesting to see whether the answer quality can stay the same as the userbase expands. Right now it works well because they have a good set

I think it will be interesting to see whether the answer quality can stay the same as the userbase expands. Right now it works well because they have a good set of smart users who contribute answers as well as asking questions. If the site gets flooded by people who only ask questions, the number of answers per question will decrease. Quora actually reminds me a lot of Yahoo Answers back when it first came out. The community there was smart and quality of answers was high. But they used a game mechanic to ensure that people answered questions, and so the site became flooded with bad answers to the point that it is now useless. I really hope Quora can avoid going this route, as it's a really useful resource as Jason says.