I met Marshall Harrison and Michael Dunn while at TechEd this week. Marshall and Michael did a great chalk talk on Speech Server 2007 development. Both blog on speech and are very active in the Speech dev community.
Marshall started a community called gotspeech.net, which just hit 1000 registered users and has a new tutorial series that looks great.
Michael just published Pro Microsoft Speech Server 2007.
Both are great guys to hang out with and between the two of them represent some serious Speech dev brain power.