The main website also links to a wiki with some information in it:
http://www23.atwiki.jp/ast2011/
Of interest are eligible anime lists:
http://www23.atwiki.jp/ast2011/pages/14.html
http://www23.atwiki.jp/ast2011/pages/15.html
And eligible character lists:
http://www23.atwiki.jp/ast2011/pages/28.html
http://www23.atwiki.jp/ast2011/pages/29.html
I imagine neither is exhaustive. I don't know Japanese and am going off online translators but I'm pretty sure that what those lists are. It may also list some ineligible characters with reason behind ineligibility but I'm not sure.