The best way to contact me is via e-mail. If you're looking at my CS webpage, you probably want my CS e-mail. To help avoid web crawlers stealing my e-mail, I won't give a direct link to it. If you want to know why, check out his research. If you want to stalk me, you can always facebook me.
joel (at) cs (dot) brown (dot) edu
joel_weinberger (at) alumni (dot) brown (dot) edu