[icey]

It does require Silverlight (as do all DLR languages if you want them to run in the browser). Take a look at the js: http://gestalt.ironpython.net/dlr-latest.js

[chc]

Ah, thanks for the clarification. The way the page phrased it made me think you just needed to include that Javascript and it would work. There are language implementations like that, so it seemed plausible. That's too bad.