The Reason Rally is a big atheist gathering in Washington DC. Many LWers are planning on being there anyway, so why not have a meetup?
Note: I will not be there, so someone else should step up to set location and time!
Edited- Originally the Ohio LW group was thinking of going. Only a handful were really interested, so most of us won't be. But many other LWians are interested, so I am leaving this post up.