Biden rising? In addition to this recent American Research Group poll showing Joe Biden overtaking Bill Richardson for fourth place among likely Democratic caucus goers (rising to 8%), Insider Advantage has come out with another poll suggesting that, of all Democrats, Biden has gained the most among South Carolina Democrats since July 2007 (an American Research Group poll also has Biden gaining--though not by as much). Real Clear Politics offers this breakdown:

Obama 26 (-2 vs. last poll, July 23-24)
Clinton 24 (-19)
Edwards 15 (+2)
Biden 10 (+6)
Richardson 2 (-3)

Biden hasn't yet seen these gains in IA and SC be translated into much growth in the national polls. The Washington Times has more on Biden's ambitions for Iowa.