I\'m currently using Open Flash Chart 2 on my django website, but I find it insufficiently customizable. (It\'s great when you want the usual barcharts, piecharts, but what
If you're looking for flash-like interactivity in a web application, matplotlib probably isn't what you're looking for. It's fine for rendering a static image to serve out in a web app, though. (and is amazingly flexible)
However, there's been a lot of recent development on making matplotlib more oriented toward web interactivity. Take a look at the new HTML5/Canvas backend. http://code.google.com/p/mplh5canvas/ It's not quite finished yet, but it's worth playing around with, anyway.