On the TechNet you can find numerous articles that can be related to BizTalk Administration:
Another good resource for BizTalk Administrators is of course MSDN, where you can find a lot of information:
There are a few white papers on BizTalk administration:
At the BizTalk Server Developer Center you can also find resources for BizTalk administrators. Although the title can be a little misleading as it may look like developer focused. However you will find resources and information that is more administrator specific:
There are two courses you can take that are targeted towards BizTalk Administrators:
There is one virtual lab on BizTalk Administration:
On LinkedIn you can find groups targeted for BizTalk Administrators:
Another important place to find a huge amount of BizTalk related articles is the TechNet Wiki itself. The best entry point is BizTalk Server Resources on the TechNet Wiki. Read suggested related topics:
These articles is also available in the following languages
Steef-Jan Wiggers edited Revision 1. Comment: Added resource link
Steef-Jan Wiggers edited Original. Comment: Added topic blogs and text
Added the category Virtual Labs
Tord G.Nordahl edited Revision 20. Comment: added reference on the technet wiki section
Tord G.Nordahl edited Revision 24. Comment: updated a link
Steef-Jan Wiggers edited Revision 30. Comment: Added topic and link
Steef-Jan Wiggers edited Revision 31. Comment: Added links
Great
Steef-Jan Wiggers edited Revision 36. Comment: Minor edit
Sandro Pereira edited Revision 37. Comment: fixing links format (different color)
srikanth peddy edited Revision 39. Comment: updated BizTalk Server White papers link to social.technet.microsoft.com/.../15469.biztalk-server-white-paper-gallery.aspx
Great article with an excellent summary of almost everything
Maheshkumar S Tiwari edited Revision 41. Comment: Minor formatting