As far as licensing is concerned. Aren't you violating the AGPL guidelines by not releasing the theme to the public when asked to? The answer is yes, rhetorical question, please refrain from answering.
You are wrong, you don't have to release any mod, themes or infusions. AvaLoN can make all the themes he/she wants but he/she doesn't have to release them.
The funny thing is you have said in a previous post in the forum that you would not be giving out your gamer alien theme so i am going to steal it and release it just like you have done with the theme AvaLoN made, lets see how you like it.