Solutions, better

javascript jquery web20
John Resig announced the release of jQuery 1.1.3.
Expect improved speeds, with DOM traversal over 800% faster than in 1.1.2, re-written event system, with more graceful handling of keyboard events and re-written effects system (with an accompanying fx test suite), featuring faster execution and better cross-platform support.
jQuery 1.1.3 Features:

Massive Selector Speed Improvements
New Selectors
Animation Improvements
DOM Event [...]

rss feed mark rfc standard web20 web2.0 xml rdf parsing feedparser atom syndication
When it comes to feeds, I’m diving into mark.
http://diveintomark.org/archives/2007/05/16/hilarity-ensues
It’s hard to add anything though. Feeds are cool, parsing them are boring.