Michael Nygard posted about SAP's SOA capabilities. I wasn't sure if he'd appreciated their complexity, but he does emphasize that in a comment on this post here.
We're talking really complicated, WS-*-ish bits. My advice from hands-on experience two years ago would be: stop; walk back slowly, slowly; now turn and run; faster.
Not the kind of good system attributes I think of when reading Michael's book.