jQuery 1.2.6 released a months ago with some exciting improvements:

• Event Handling is 103% Faster
• CSS Selectors are 13% faster
• .offset() is 21% faster
• .css() is 25% faster

and many others.

Have you felt the speed change on my site? ;P, maybe not!

Google code prettify is:

A Javascript module and CSS file that allows syntax highlighting of source code snippets in an html page.

And I am using it right now. Using jQuery to add class prettyprint to all <pre> units and then render it by Google code prettify. It works just fantastic! Check this example out!