Meebo reveals javascript performance secrets
blog.meebo.com
"All of these techniques come together in the next version of the Meebo Bar, making it the best performing and most technically advanced version of the bar yet."
blog.meebo.com
http://blog.meebo.com/?p=2589#comment-1142969
which points to this (older) "devblog" entry having some actual detail:
Here's the front page for the "devblog" category.
Unfortunately, while p=2320 says it's part 1 of 3, I don't see parts 2 nor 3 under that category; they appear to not exist (yet).
EDIT: Here's the mentioned presentation, as an unembedded YouTube URL: