This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
I know groovy is incompatible with applets and I know jython works well for implementing applets (or at least the hello world applet works with jython). What are the other constraints with regard to scripting languages and applets?
But that's been possible using the native Rhino API for years, and the Apache BSF library has put a universal API on top of quite a few scripting languages for almost that long. So I don't see much new stuff happening that wasn't possible before.