There is a lively debate over economic policy going on in the press and the blogosphere featuring UberKeynesian economist Paul Krugman, and economic historian Niall Ferguson. The Times has a nice article outlining the major points at issue (noting that Krugman fights dirty, resorting to ad hominem attacks and even playing the race card). Even better than the article are the comments attached, some of which are interesting and informed.
Check it out here.
For the record, I think Ferguson is on much more solid ground. His is an international perspective sorely lacking in Krugman's analysis.