Nearly a year after it was bought by Google for $100 million, FeedBurner is finally going to roll out Google’s AdSense as an advertising option for blogs and Websites that use its service to publish their feeds. FeedBurner will start with a few select publishers next week, and then expand the option to all of its customers soon afterwards.

What took them so long? That seemed to be the whole point of the acquisition.

FeedBurner intersperses ads in blog feeds between every few posts. Integrating with AdSense will allow for publishers to tap into contextual ads for their feeds, in addition to the ads that FeedBurner already sells.

Hopefully, Google also found the time to integrate its automated back-end payment system into all FeedBurner accounts. Until recently, FeedBurner was still sends out paper checks to publishers participating in its ad network. At least, that’s how TechCrunch gets paid.