http://rorikon.blogspot.com/
The blog's owner is a fan as well as a researcher on the lolicon topic. I've read that the owner has some sort ot problem with Wikipedia. Anyway, from time to time, he posts some interesting links and articles in English. Although right now there is a discussion about the content in the English Wikipedia, I think is worth checking from time to time to see some serious and not so serious discussions about lolicon. Also, some of the links the blog has, are really interesting, specially:
http://lolikon.blogspot.com/
Give it a try.