Brian Livingston of Infoworld has noticed RSS:

I believe this is just the beginning of a tectonic shift that your organization must plan for. Soon after Microsoft made its move, other corporations such as Cisco Systems and Fawcett Publishing started their own RSS-compatible streams.

Dave Winer, the coinventor of RSS, says he was happy to find out that Microsoft's new feeds don't use proprietary tricks. As a result, the Microsoft feeds are compatible with any RSS aggregator.

When aggregators become widespread, many b-to-c newsletters will switch to RSS and drop now highly unreliable e-mail. I wrote three months ago that ISPs such as Hotmail and Yahoo, trying to stop spam, shunt to a junk folder or simply delete 25 percent of newsletters requested by subscribers (see More e-mail scandal, Jan. 6, page 22.)

I guess RSS and aggregation are about to hit the bigtime :)