eWeek has published their list of the top 15 Open Source Influencers. I think it represents a pretty good cross section of people that are currently deeply involved with open source software. Of course I am also biased since Mike Milinkovich is #3 on the list. Congrats Mike!
Of course not everyone agrees, for instance Marc Fleury seems to be a bit put out, and Stephen Vaughan-Nichols mentions some names that he thinks are missing.
