Looks like Autodesk may be purchasing talent. Seibel is certainly someone who could fit into Autodesk's executive succession track; Bartram has some pretty solid technical chops in video, and Luccisano has a strong Rails background.

As Autodesk reengages in multi-platform development, all three developers potentially deepen the in-house knowledge-base - I try to keep in mind that Autodesk is a mature company and has always seemed to have had a bit more of an academic culture than a typical software company (e.g. the use of Lisp in their flagship product).