Add a toogle button on the top-right corner. The chat will go FullScreen when pressed.This extension allows you to put the chat in fullscreen (on a TAB).
This is useful if you want to keep an eye on the chat, while reducing the grooveshark window to a minimum.
With the 1.0.1 version, all urls are links in the chat.
If you want to take a look at the minimal code, help yourself:
Javascript injected: http://pastebin.com/dCT39HqS
CSS injected: http://pastebin.com/WaV8q8ka
You can also get really creative and launch it from the "chrome for windows 8", in order to have the grooveshark chat always available, as demonstrated in this screenshot: http://i.imgur.com/rQzUmF1.png
As of the update 1.0.1, I added Jquery, https://github.com/SoapBox/jQuery-linkify, in order to turn all urls into link in the grooveshark chat.