As we noted earlier, there has been some confusion as to whether the McCain campaign was or was not buying up airtime in Indiana this week.  Well, it turns out that it's actually the Republican National Commitee's independent expenditure arm making the six-figure buy:

Two sources familiar with the media-buying plans say the Republican National Committee is set to spend six figures shoring up John McCain in the traditionally Republican state of Indiana.

The RNC's independent expenditure arm — which is outside the direct control of the campaign or the committee — has placed a $100,000 buy with WISH-TV in Indianapolis, the CBS affiliate in the capital, one source said. Two sources said the buys across the state start on Tuesday, Sept. 30.

The distinction between McCain and the RNC making the buy is pretty irrelevant at this point.  After all, the campaign and the committee began building a joint fundraising operation shortly after the primaries.

Meanwhile, Blue Indiana updates us on the Obama camp's ever-expanding ground game in the Hoosier State:

The thing to remember is that although the RNC can dump some cash here on negative attack ads, they can't compete with the on-the-ground operation that Obama has had in place across the state for months. This election will more than anything be about turnout, and Obama has the clear advantage on the front. [...]

And just this afternoon, we get word that another five Campaign for Change offices are opening across the state. The new field operations in Batesville, Chesterton, Indianapolis (another one!), Shererville, and Crawfordsville bring the total up to 37.