I'm in Cambridge, MA at this:http://www.w3.org/News/2003#item50

W3C holds its third annual Technical Plenary and All Working Group Meeting from 3-7 March in Cambridge, MA, USA. More than 25 W3C Working Groups and Interest Groups hold face-to-face meetings. Mid-week, many of the 400 participants attend the all day public plenary.

See also this and this in my Hiptop Nation weblog.