IBM
Lots of interest, including culture gaps during international mergers and IBM's management style.
First part of their "Using open source software to design, develop, and deploy a collaborative Web site" series. (Typo in one of the graphics.)
IBM and its internal dogear application get a few paragraphs, as do del.icio.us and Flickr. I'd love to read from more skeptics like Greg Blonder, though.
I've been using del.icio.us as a blogging tool for months now.