At the upcoming O’Reilly Velocity Confrence in June, one of the sessions will cover how Hotmail links its performance to business metrics:
The parameters modeled range from: (a) Server Side: application’s design, systems architecture, Server SKU’s, geohosting, CDN’s, to (b) Network-Related: bandwidths, connectivity, network latencies, last mile effect, to© Client-Side: OS and browser mix, system configs, to (d) Business-Related: current/projected revenues, market shares, user-minutes, competitive advantage, feature parity, discoverability and adoption, and trends, to (e) Performance-Related: where Hotmail is with respect to its regional/global competitors and previous milestones. The model is …

Getting Prototype, Scriptaculous, and MooTools working together is fun enough. If you are having issues with IE8 also, here is a tip:
Version 1.6.1 RC2 is available for download, and it fixes most issues with IE8.
The current git tree has some minor extra fixes. It works fine for us ( http://www.skyrock.com ) even with the IE8 version shipped with the latest Windows 7 preview.

Share and Enjoy:

This is a great visualization created by Jeff Clark that shows the latest 1000 tweets for a given word that you can pass through a search parameter like this: http://www.neoformix.com/Projects/TwitterStreamGraphs/view.php?q=swine%20flu
The StreamGraph shows the usage over time for the words most highly associated with the search word.
via Twitter StreamGraphs.

Share and Enjoy: