Really awesome Google Calendar-style interactive calendar rendered with jQuery. Drag & drop events, callbacks for everything, awesome.
Heat maps, point clustering, etc. Built on top of Raphael.
I suspect that many years from now we'll refer to late 2008 as the start of “Browser Wars II”. That said, this looks pretty fucking sweet.
I sometimes think the difference between a good and a bad programmer is an understanding of first-class functions.
Mah head asplode.
This is a pretty big deal: I've been using ctypes in Python for quite some time, and I can attest to how much better it is than writting C/C++ wrappers. XPCOM in particular is a total PITA, so js-ctypes should mean a bunch of new, awesome Mozilla plugins.
It's certainly been done before, but this particular implementation is the best I've seen. Clean, slick, and looks great.
YUI-Ext tool for reading Django-serialized JSON data.
Standalone JS source minimizer
“…like Google Maps for time-based information.” Holy crap this is cool.
How to use Dojo from a different domain
Color-picker widgeet based on Yahoo's UI library. The code's kinda crappy, actually, but the idea is pretty good.
MIT licenses JSON encoder/decoder in Python. Besides the better license, the code is much clearer than json-py
This, as Simon says, is huge.