Cheers. I work in that industry, so a little involved.

Whilst not 'official' meeting minutes, for a personal record I jot down mind maps (generally on a tablet), however I know a few people that love these: http://www.livescribe.com/ for keeping a record.

Also, text to speech is text to speech. It's a pretty challenging problem with a single speaker and no room acoustics to worry about (headset mic) throw in a number of speakers and other sound sources and things get interesting. Even in courtroom environments where you have discreet audio feeds from each party AFAIK most places still use humans to create transcripts.