People don't just watch TV anymore, that tweet about it... a lot.

They share reactions to reality shows, touchdowns, season finales.... and advertisers and network executives have started to notice.

The recent finale of Breaking Bad generated a record of 1.24 million tweets. Nielsen is releasing its first "Nielsen Twitter TV Ratings" report today.

The study measures TV-related conversations on the social network -- just as Twitter is preparing to go public.

--Rob Archer