I would be delighted to help.
I fear this might be one of my first posts, but nothing besides this has truly caught my attention before.
I am extremely interested in helping with development and just look at how everything works. I myself am only a mere self-taught programmer, and I would never think of hurting such a nice game as ROTMG. Being a self-taught programmer and a big fan of ROTMG, I would love to see the source code, and like you are drooling about, do cool and awesome stuff with it. I could however easily see how someone could abuse this and create a private server with a donating system.
I am very versatile with programming languages, but I might be a little short on time.
Please contact me if you are interested in my help.