Yahoo!’s whitepaper on RSS makes an interesting read. Though stating the obvious, Yahoo!’s whitepaper shares some good stats on the awareness and usage of RSS.
Out of the surveyed, while 12% are aware of RSS, ony 4% were using RSS. Interestingly, there are 27% who are unware that they are using RSS.
Yahoo! has also released a guide to publishers which lets you submit your RSS feeds to Yahoo! and track its sucess as well.