These progressive candidates have already announced that they will be running in 2012. Significant fund raising help now will ensure that they can be competitive next year.
(I've avoided candidates where there are competitive primaries.)
Senate:
MA:
Elizabeth Warren - No explanation necessary, perhaps this quote should suffice. "There is nobody in this country who got rich on his own. Nobody."
http://elizabethwarren.com WI:
Congresswoman Tammy Baldwin is running to replace retiring Democratic Senator Herb Kohl, and would be the first ever openly gay senator.
http://www.tammybaldwin.com House:
AR-3:
Army veteran Ken Aden, a founder of a non-profit, is taking on GOP Rep. Steve Womack
http://aden4arkansas.com CA-2:
Policy-wonk and political activist Norman Solomon is running against incumbent Republican Wally Herger.
http://www.solomonforcongress.com CA-3:
Ami Bera, a medical doctor, ran for this seat against Dan Lundgren in 2010, and came up short. With the increased turnout generated by the presidential election, this race could be winnable this time.
http://www.beraforcongress.com CT-5:
State house speaker Chris Donovan is running to replace Democratic Senate candidate Chris Murphy.
http://www.donovanforcongress.com FL- 8:
No explanation necessary - he's back baby!
http://congressmanwithguts.com FL-24:
Self-proclaimed "New Deal" Democrat Nicholas Ruiz III is running against tea-party Republican incumbent Sandy Adams.
http://intertheory.org/nriiiforcongress201... Il-10:
Ilya Sheyman is a 25 year old community organizer running against incumbent GOP fresh-man Bob Dold.
http://www.ilyasheyman.com MI-8:
Lance Enderle ran as a write-in after another Democrat dropped out against long-time incumbent Mike Rogers. With re-districting possibly shaking up many of these districts, and the unpopularity of Gov. Rick Snyder and buyer-remorse setting in, this people-powered Democrats has a great chance this cycle.
http://lanceenderleforcongress.com NH-1:
Carol Shea-Porter represented this district from 2006 to 2010, when she lost to Congressman Frank Guinta. However, the dynamics will be completely different with 2012 being a presidential election, and the significant over-reaching by the GOP house, (Guinta like all but four Republicans has voted to privatize Medicare.)
http://www.sheaporter.com NH-2:
Ann Mclane Kuster came up just short against Congressman Charlie Bass in 2010 during a bad year all-around. Kuster ran a progressive campaign last-time and beat Katrina Swett in the primary election, who attacked Kuster for being too liberal for the district.
http://www.kusterforcongress.com NJ-7:
Ed Potosnak is a public school science teacher and small-business owner who is running against Republican incumbent Leonard Lance.
http://edpotosnak.com NM-1:
Eric Griego is the first candidate this cycle to be endorsed by the Progressive Campaign Change Committee, due to his support for investments in infrastructure to create jobs. He is running to replace current representative Martin Heinrich who is running for Senate.
http://griegoforcongress.org PA-6:
Iraq war veteran Manan Trivedi will seek a rematch of his 2010 fight to oust Republican incumbent Jim Gerlach.
http://www.trivediforcongress.com WI-1:
Kenosha County Supervisor Rob Zerban has the potential to give Congressman Paul Ryan a serious challenge. Ryan's medicare gutting budget proposal, and his votes to continue oil company subsidies, will not play to well there.
http://www.robzerban.com WI-7:
Former State Senator Pat Kreitlow will be running against, Paul Ryan and Scott Walker's lap-dog, Sean Duffy, one of the 2010 freshman. This is a prime pickup opportunity, with the ongoing progressive uprising in Wisconsin.
http://www.kreitlowforcongress.com 
