This WaPo article confirms my prediction from last week that "Thompson gives every McCain staffer and money backer a chance at a do-over. If the exodus from McCain to Thompson gets started, it could burgeon very quickly."
Thompson won't be the only beneficiary of the collapsing McCain campaign. Some of the money folks and much of the grassroots will have noticed Romney's momentum as well, and as the disembarkation begins, many will head straight to the Iowa frontrunner.