A couple months ago I submitted a HTML5 canvas-based Twitter app to the 10K Apart competition. Unfortunately I didn't win – I didn't even come close – but I had fun working on it and I learnt a lot while doing so (the Google balls code came from it!). Now the competition is closed I finally got around to releasing the source code on GitHub. Play around with it to your heart's content, just please attribute me if you use it, like John O'Nolan. ;)
In case 10K Apart remove this year's entries I'm now hosting the app on Rawkes, so check it out and let me know what you think.