Following last week's update, Browser-Solidity
just got even more useful.
You can now publish your code as a github gist and directly import contract/library files stored on github.
Furthermore, if your contract uses a library, browser-solidity will automagically deploy the library and link it to your contract when you create an instance of the contract.
With some URL magic, you can even request to load a gist on startup (this is handy for showing source code to someone else):http://chriseth.github.io/browser-solidity/?gist=9e8e770aaa14954dfd93