Earlier today Comex tweeted a teaser image that shows a ski slope and a sign with black diamond and PDF symbols. The ski slope and diamond icon could be a reference to 'alpine' which is the default password for root access on iOS. The PDF could be a reference to the previous PDF exploit Comex uncovered in iOS 4.0 (JailbreakMe 2.0).
JailbreakMe allows users to jailbreak straight from their iOS device via Safari. These userland jailbreaks are quick and easy but usually patched by Apple rather quickly.
This jailbreak could either be for 4.3.3 or 5.0, or even the iPad 2. Remember, all devices except the iPad 2 will always be jailbreakable via the Limera1n exploit. Apple can easily patch the untether so it would not make sense to burn an exploit with iOS 5 releasing in a few months.
Read More [Comex]