Even though the newly-released 4.3.4 update was supposed to correct the PDF vulnerability that allowed for jailbreaking, the folks at Redmond Pie managed to cobble together a tethered jailbreak with PwnageTool that'll get you right back into Cydia.

Well that took forever. With no word yet from the iPhone Dev Team or Comex, a jailbreak has just been let loose for iPad 2 owners running iOS 4.3.0. You should, as always, tread with caution, but happy jailbreaking! [Engadget]

Boy, that was fast—iOS 5 has been jailbroken by a member of the iPhone Dev Team, with photos posted to his Twitter account. Unfortunately only tethering works for now, but that's something, right? [MuscleNerd via Redmond Pie]

Compatible with iOS devices running Cydia, Redsn0w 0.9.6b4 has been released by the iPhone Dev Team, following their 0.9.6b3 release over the weekend. Devices must be tethered to a Mac or PC for the process to work. [iPhoneDevTeam via RedmondPie]

We don't have confirmation on this beyond the word of a Czech-based developer who has tested it, but apparently Apple is blocking push notification services in unofficially unlocked iPhones. However, we have tested it and it works.

The iPhone Dev Team, jailbreakers of all things iPhone, have released a demonstration video of a version of yellowsn0w they dub "ultrasn0w" that purportedly unlocks every version of the iPhone running everything from 3.0 on down the line.

The iPhone Dev Team has got us excited (and Apple worried) by announcing they have a fully-working software carrier unlock ready for the 3.0 firmware ahead of its official release.

It's still a command line-only jailbreak tool, but the OS X, Windows and Linux-compatible app can jailbreak your iPod touch 2G slightly easier than it could before. It's still a horrible name. [Redsnow via Slashgear]