Squidoo and Hubpages are two websites where registered users can post complex articles about very many topics. according to the announcement post on the Hubpages website, Squidoo features will be integrating into the existing Hubpages.com site.
I have actually typed stuff up for both sites. The one feature that I hope gets into Hubpages is the adventure badges. Two of them both use various media boxes that make up the articles (Text, picture, embed video via Youtube). Basically helps with structuring your articles.
http://tonyx35.hubpages.com/ if you want to read some my posts.