This strikes me as more significant than Pawlenty for Romney, because it represents the future of the Republican Party coming out for Perry, whereas Pawlenty in many ways represented the past.  Via CNN:

Louisiana Gov. Bobby Jindal is backing Rick Perry for president, a major endorsement for the Texas governor as the campaign for the Republican nomination enters the crucial fall stretch of the primary calendar, a source tells CNN.

Jindal is on his way to Florida and will be Perry’s guest at Monday night’s “Tea Party Republican Debate” broadcast on CNN from Tampa, the source said. Jindal is expected to formally make the announcement prior to the debate.

I’m a Bobby Jindal fan.  And I still love the video I posted the first time I mentioned him at the blog in November 2008, Bobby Jindal 2012.

If this is a trend, it will be bad news for Romney.