PubSub, a weblog search engine that (amongst other things) turned persistent queries into feeds, has officially gone under. GigaOM has the news:
The PubSub-KnowNow deal was apparently so close to completion a few months ago, they had started telling the press about it. I did a pre-briefing call with the two companies, who at the time insisted it was a “merger.” The idea was that PubSub had the consumer product while KnowNow had enterprise chops. A couple days later, PR asked me to hold the story while “the lawyers figure things out.” What was really happening, it seems, was conflict between PubSub shareholders was killing the deal…and the company too.