On Friday, Lawson English wrote (about Second Life):

> Anyway, so after finding my javascript book and playing around with sample
> scripts online, it seems trivial to implement a simplified
> Smalltalk browser interface on a webpage. Of course, if someone already has
> a sample of this (javascript only--needs to run inside SL
> for immersion effect), feel free to point it out.

If I understand your needs, Seaside already has what you want:

* http://www.seaside.st/about/screenshots  (click on Code Browser)

* http://www.seaside.st/documentation/tutorials/A+Walk+on+the+Seaside#172795377

(On the PierCMS, the icon to open the Class Browser is not a wrench
but a notepad.)