VentureBeat is reporting that Microsoft has agreed to buy semantic search engine Powerset for somewhere around $100 million, which is the price we previously reported was being offered to the company.

VentureBeat says this is a done deal. Our sources say it’s highly likely, but hasn’t actually been signed yet and could still be disrupted by the ongoing Microsoft-Yahoo negotiations.

Powerset debuted at TechCrunch40 last fall and opened a showcase of its technology to the public just last month.

Crunch Network: CrunchGear drool over the sexiest new gadgets and hardware.