Cool discovery of the day: some mailing lists including those at the W3C are now using an X-Archived-At: header to give a permanent URL for the message. I can key off of this to make better links for quotes of the day from e-mail messages, as well as to link to recommended reading in e-mail. I encourage other mailing lists to adopt this excellent practice. Kudos to the W3C. I wish I'd noticed this months ago.
The W3C has released the second edition of MathML 2.0, an XML application for describing mathematical equations and data in both semantic and presentational forms. This is mainly an editorial rewrite of the spec. It's not significantly different than MathML 2.0 in most respects.