To play a character and see the availabilities, go to http://www.twimeadow.ning.com/ where everything will be explained properly, or you can go to www.twitter.com/x__renesmee (the creator of the Twilight family group).
Currently the characters that have been taken and are no longer available are:
Spots go quick! First in, best dressed!
The rest (including EDWARD and JACOB) are vacant! Theres a whole heap of characters to choose from, so go ahead and get twittering!
Suggestions? There's Leah Clearwater (I think she'd be real interesting to play! With the whole heartbreak over Sam thing), some of the other wolves (because you can just make anything up about them), Jacob Black (hello -wolf hottie! And it'd be interesting to see how he plays out with Renesmee after BD!), Edward Cullen (like OMG!), the Volturi...and a whole heap more!
It was requested by the creator of the site for me to tweet about this, and I did, but then I thought that the non-twitterers were missing out!
Have fun, Twilovers!~