How about Philadelphia Pennsylvania? Isn't there a OS/2 user group in that area ? PASUG? . "Formerly The Philadelphia Area OS/2 User Group". Perhaps Warpstock could be expanded to include other alternative operating systems?
Here is the Google results for hotels for Philadelphia PA. There is a lot to do in Philadelphia PA.
Is PASUG still around to host one in 2011? Philadelphia PA is very close to me and I can drive there. 
http://www.pasug.org/
They still have some OS/2 stuff. 
It might be safer than NYC. There is a lot to do and see in Philadelphia, PA.
http://www.gophila.com/
Tom, you should approach the guys in Philly about the possibility. They did it in 2000 (I missed that one, actually). They are a technically savvy group, and embrace a range of operating systems.
Over the years, it has been suggested that Warpstock merge with other events to become a more "alternative OS" gathering than centered around OS/2 and (now) eCS. As Warpstock's mission statement clearly defines:
I have sent them an e-mail about hosting the 2011 Warpstock convention and how they could expand it to include other groups.
Philadelphia Alternative Users Group.
http://www.pasug.org/ llavins@comcast.net
I am a member of SCOA (Smart Car Owners of America). They are thinking of doing a get together of not just Smart cars but also other brands / models of vehicles (vehicles that one might not see a lot of). It will be in the Poconos.
http://www.smartcarofamerica.com
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http://www.warpstock.org/forum/viewtopic.php?showtopic=435