Thought it'd be useful to have a community-aided list containing sources of lolicon on the internet. You're all welcome to add anything missing from what I have so far:
* https://8ch.net/loli (obviously)
* https://8ch.net/cgiloli/ (not very active, but..)
* http://exhentai.org/ (Manga/comics - search for "lolicon". Requires free registration and a bit of Googling to get in)
* http://nhentai.net/ (Almost identical to exhentai.org, but much easier to get into and look around)
* https://chan.sankakucomplex.com/?tags=loli (Images, gifs, webms, Flash games, etc)
* http://gelbooru.com (Similar to sankakucomplex.com above, but with advertisements and lesser search features)
* https://allthefallen.ninja (Forum for people to post videos, games, gifs, and everything else. Registration only required to view post attachments)
* http://www.dlsite.com/ecchi-eng/fsr/=/genre/207/from/work.genre (A site where most of the Japanese creators of content sell their movies, games, etc. This can give you a good idea about what something is called or what to look for. This link is for the English side, and I'm pretty sure DLSite omits some items if you switch to English, so this might not be a complete list. Example: http://www.dlsite.com/ecchi-eng/circle/profile/=/maker_id/RG22866.html)
* http://fapforfun2.blogspot.be/search/label/Hentai (This guy seems to be keeping well up-to-date with new Hentai videos. Some of which are loli)
* http://sukebei.nyaa.se/ (An amazing torrent site for anything Japanese, including art or real life. Lots and lots of loli stuff to be found here. My favorite submitters are NewDragon (video) - http://sukebei.nyaa.se/?cats=7_25&user=233960, mikocon (games) - http://sukebei.nyaa.se/?user=102122, Chainkiller (Full, subbed movies in high quality) - http://sukebei.nyaa.se/?user=80807, and hikiko123 (video) - http://sukebei.nyaa.se/?user=80807)
That's all I've got so far. Anyone else have any good sites they know about?
(My post's gif source is Nisemono: http://www.dlsite.com/ecchi-eng/circle/profile/=/maker_id/RG22866.html)