A year and a half ago, changes to Microsoft’s adCenter interface appeared maybe once or twice a quarter. This year, stay tuned for monthly updates bringing everything from Broad Match Modifier, a desktop version for the Mac, a special version for small businesses, and more integrated interactive ads on Bing.

“When we talk about the 2012 spring release, which started in January and will continue through the June timeframe, we’ll get into a monthly cadence of launching capabilities to the market,” David Pann, general manager for Microsoft Advertising’s Search Network told me. “[This will be] both at the advertiser level and in changing relevance algorithms — matching, ranking, pricing, the black box. We’re making these changes giving advertisers more control and greater transparency.”

Following, a few of the enhancements coming up in the next few months: