The folks at WM NYC are planning a mini-conference this summer, Wiki-Conference New York. Similar in spirit, but smaller in scale then Wikimania, it will serve as a great alternative for people like myself who can't make the trip to Buenos Aires, and can't take a whole week off for a big conference. Dates aren't set yet, but the planning is going ahead at full steam.
I'll post more details as they get nailed down, but if you're going to be in the New York area this summer, it would be a cool event to attend. I hope to see a lot of other Wikimedians there.