In a recent interview with Ars Technica, Brent Simmons, the author of one of the most popular RSS readers (NetNewsWire) for Mac OS X gave a great scoop on some of the forthcoming updates. Looking at the roadmap for 4.0, he identified PostRank as one the top features to help his users find and read the stuff that matters:

NetNewsWire 4.0 will bring new features and changes to fall in line with NewsGator’s aspirations for taming information. At the top of the new features list will be integration with AideRSS and the company’s PostRank technology for automatically filtering newsfeeds for hot topics and headlines. NewsGator is already using this technology in its web-based client for its top 1,000 feeds, but NetNewsWire 4.0 will bring AideRSS and PostRank to Mac OS X Leopard. If you’re drowning in feeds and headlines that you constantly shrug off with the “mark all as read” command, this new PostRank technology should help you to at least catch the stuff that really matters.

Expect to see the big 4.0 update with PostRank integration in the ‘Fall-ish’ timeframe!