Recently an executive at HP claimed that his company now employs 9 out of the top 11 security people due to HP's acquisition of SPI Dynamics:
"Nine out of the world's top 11 security hackers came to HP through the SPI Dynamics acquisition, he boasts, although it's not immediately clear who ranked those top 11."
- Mark Potts, CTO of Software, Hewlett-Packard
Now eWeek has produced a list of the 15 most influential people in security today. Here is the quick non-multimedia version:
I don't see any SPI Dynamics or HP people on this arguably less biased list. I do see 3 of my former collegues from @stake: Dave Aitel, Dino Dai Zovi, and Window Snyder. Seeing that giants Microsoft and Google only got 2 each on the list and @stake has 3 it lends credence that @stake was the place to be for hard core security people.
Wikipedia has a nice large list of computer security specialists.