These market leaders (all former employers/successors) continue to innovate and inspire:

www.nasdaq.com - The world's first electronic exchange (1971) and the first to operate a alternative trading system for private companies (as a result of the acquisition of SharesPost). 

www.sun.com - A market innovator for 25 years spawning some 75+ CEOs from Google (Schmidt) to Yahoo (Bartz) to Motorola (Zander) to who-knows-what's-next... as Oracle.

www.akamai.com - Streaming leader is successor to startup (eMedia) delivering rich media innovation now part of Akamai's StreamOS.

www.wine.com - Early ecommerce player resulting in category killing e-tailer that includes WineShopper.

www.amazon.com - The model for interactive experimentation in B2C and, increasingly, Platform-As-A-Service (PAAS). WineShopper was controlled by Amazon.

www.aol.com - Original online community development and monetization. Part of team launching ClassifiedsPlus and the vertical strategy for AOL Ecommerce & Digital Cities.

www.paconsulting.com - Predecessor Theodore Barry & Associates (TB&A) was an MBA proving ground since the 1950's.

www.skadden.com - My introduction to superior professional services and workproduct.

To keep an eye on...

At Sun we tend to use LinkedIN when folks leave. So if we actually worked together see:
http://www.linkedin.com/in/sambhayes

On the social side, I have a Facebook page but rarely check:
http://www.facebook.com/people/Sam_Hayes/14502451