For the library question, of course. =) I basically meant "Raphael doesn't do the same type of stuff as jQuery, right?", which is sounds like it doesn't. =p
The only problem with the Visualize one is it doesn't work on mobile (it's SVG-based).
The problem is that I won't have just one graph, but probably several (at least a half dozen) as well as an element which uses a pretty hefty canvas element (it's hefty enough that I'm going to probably have to implement proper culling =p). Of course, this could (should, and probably will) involve looking at the workflow again (especially for mobile devices). This is a rather hefty project that we're beginning, so I want to keep the basic as trim as possible to give us as much wiggle room as we may need later on.
It looks like if I went the canvas-only route, with a shim for for IE <= 8, I should cover just about everything. The only thing I'm not sure about is Android 2.0 (which doesn't support canvas) and other devices (couldn't find stats for Blackberry and WebOS).
... I think now I've officially stepped into way-too-OCD-territory. =p
Canvas only it is!
Thanks for the help. =)