Yesterday’s Times reports:

Four years ago, the Internet was a Wild West that caused the occasional headache for the campaigns but for the most part remained segregated from them. This year, the development of cheap new editing programs and fast video distribution through sites like YouTube has broken down the barriers, empowering a new generation of largely unregulated political warriors who can affect the campaign dialogue faster and with more impact than the traditional opposition research shops.

Already there are signs that these less formal and more individual efforts are filling a vacuum created by a decline in activity among the independent advocacy groups — so-called 527s and similar operations — that have played a large role in negative politics in the last several election cycles. Especially on the conservative side, independent groups have reported trouble raising money, and some of the biggest players from 2004 have signaled that they will sit it out this time around.