Send email to an address and have it publish to an RSS feed.
#feedbuildr
Feedwhip
Feedwhip can automatically create an RSS feed or send email alerts for (almost) any web page on the internet. Change a Feed Feedwhip lets you customize any RSS feed, from any source, and read it the way you want, in any RSS reader.
FeedXs
Manually create a feed without an existing content-base etc