This is an useful article written by Sandro Pereira about some usefull BizTalk errors.
For example during installation, configuration and around a BizTalker lifecycle
http://social.technet.microsoft.com/wiki/contents/articles/7204.biztalk-list-of-errors-and-warnings-causes-and-solutions.aspx
I have documented many of these errors but is really difficult find them on my blog :-), but you can search error message or code.
by the way you can find others error on my past posts
http://ninocrudele.ugics.org/?s=error