Cybersubculture comparison project topic

For my cybersubculture comparison project, I'd like to look at...

... Disaboom, a SNS for people with disabilities:

http://www.disaboom.com/

... and Elftown, a SNS for fantasy enthusiasts:

http://www.elftown.com/

Ostensibly, these are two very different communities. Elftown is a space where people entertain themselves by creating and interacting with avatars, while Disaboom is a site far removed from the realm of make-believe, where people gather to swap experiences and work through "real-world" problems. For that reason, I'll be focusing on similarities between the two...