Biztalk and SharePoint

Jan Tielens is really getting me hot on these two servers, and if I get some time I need to dig into them. Question to all of you, why isn’t Microsoft targeting architects more about their server products? They look from where I am as very interesting niche things that can’t really help me… A bit like ADAM or active directory. I know they are there, I know I’m constantly rewriting whatever is in there to provide my own solution, but at the end, I have no authoritative voice as to if I should rely upon these packaged software pieces.