If you are an iOS 5 developer (or play one on TV), you may be interested in jailbreaking your iOS 5 devices (iPad 2s need not apply) so that you can build Notification widgets or something. The good news is that you have two different options. One is from @iH8sn0w who has released the snowbreeze 2.8b1 jailbreak for tethered iOS devices.
That follows the Dev team, which released redsn0w 0.9.8b1 for Mac (Windows) on Friday.
Both jailbreaks are “extremely beta”, but can be used to exploit notifications and other iOS 5 technologies.