This presentation: http://www.cafeconleche.org/slides/sd2007west/syndication/
The myth of RSS compatibility: http://diveintomark.org/archives/2004/02/04/incompatible-rss
RSS 2.0 and Atom 1.0, Compared (www.tbray.org)
Atom Enabled: http://www.atomenabled.org/
The Atom specification: RFC 4287
Atom Publishing Protocol: http://ietfreport.isoc.org/idref/draft-ietf-atompub-protocol/
Wikipedia: http://en.wikipedia.org/wiki/Atom_(standard)