Just a quick note on Attention.XML.
To that end, Tantek was kind enough to invite me to join the effort as a co-author. I am happy to be able to contribute to this effort, and hope it will make quick progress in becoming a useful standard in the RSS space!
Please feel free to take a look at the spec-in-progress, and lend a hand!
Oh yea, and as a shameless plug, i would like to say this was published, then edited (to add this comment) from outlook using Attensa for Outlook. :-)