There is not currently a browser in the chumby.
We've built a couple of "simple" browsers from various Open Source projects - they tend to be quite large and require a lot of resources, and the overall experience is pretty poor.
I recently built "links", a text-only, console-only browser, and it was just under a MB.
This is not to say that there will be no browser for chumby in the future - just that it's a hard problem to do well.
Perhaps some enterprising programmer will port a relatively complete WebKit implementation or something.