I realize that this journal and these articles are for purchase but many of you may be able to find them for free though your local library, through a college or university library, or elsewhere.
This July 2008 supplement is all about IBD -- and I haven't read the whole thing yet -- but although much of the information is technical in nature, it is very interesting. I guess you might call it a meta-analysis of current thought on IBD. That is, many of the articles pool information gathered from numerous studies. Hope it's helpful.