The Washington Examiner's Glenn Harlan Reynolds writes there are a number of Tea Party groups trying to organize under the radar to get conservative voters to the polls and add some "grassroots muscle."
The mainstream press isn't very interested in covering this kind of thing anyway. Stories about Obama grassroots organizers in 2008 were fine. Stories about the Tea Party organizing this time around would conflict with the preferred (if somewhat contradictory) narratives that the Tea Party is (1) just a bunch of billionaire-funded astroturf; and (2) a preserve of racist "bitter clingers" who are too busy digging for Obama birth certificates to engage in hard political work.
Either way, these kinds of initiatives will make a difference. The question, again, is whether they'll make enough of a difference.
In 2010, the Tea Party movement delivered a huge setback to Obama and the Democrats in congressional elections. And from 2010 up to now, it's delivered telling blows to insufficiently responsible Republican legislators in one primary election and caucus after another. (Just ask former Utah Sen. Robert Bennett, or Indiana's Richard Lugar, or even the victorious but chastened Orrin Hatch).