The news has already been spreading around the blathosphere, but recently a website called Math Overflow modeled on Stack Overflow has opened up where anyone can post their mathematical questions. I would explain more, but the website is mostly self-explanatory.
MO couldn’t have come into existence at a better time for me. I’ve been carrying around a lot of questions I know someone should have an answer to, but I’ve never found a good way to ask them. For example, the conjecture I made at the end of my last post turned out to be a straightforward exercise in automaton theory. More generally I’m excited about the possibilities here in terms of improving the efficiency of mathematical research.
In other math-and-the-internet news, I have a Google Wave account, but (to my knowledge) nobody I do math with does! Hopefully this will be resolved eventually.