Biden of Delaware, who was unsuccessful in his campaign for the nomination in 1988, has been prominent as a Democrat, particularly in the last few weeks as Chair of the Senate Foreign Relations Committee.
Biden will shortly be releasing a video on his website, http://www.joebiden.com/
As far as experience goes, Biden is hard to beat. He has been a Senator since 1973, and as well as the Foreign Relations Committee, is a former chair of the Senate Committee on the Judiciary.
Biden has said that he would need to raise $20 million to be competitive in the nomination campaign. Thus far, he has $3million in his account.
Having already been to New Hampshire nearly 10 times in the last 2 years, Biden plans to travel there again next week. Expect a trip to Iowa in the near future as well.
If you have the time, check out the C-SPAN interview with Biden on his website - it's a frank discussion with the real Biden. If Democrat voters get a glimpse of this side of Biden, he will be a serious chance.