iPhone Dev team posted a quick reminder for all jailbreakers and unlockers as iOS 4.2 release is imminent:

By all accounts, we’re within a few days of Apple’s official public release of Firmware 4.2. Here’s what you need to know:
  • Thanks to geohot’s limera1n exploit, and our original pwnage2 exploit, and @pod2g’s ipod2g-MC exploit, absolutely all devices at all iOS firmware versions are capable of being jailbroken.
  • The untethered jailbreak of those very latest FWs and latest devices depends on @comex hacks. His hacks so far extend only to 4.1 and 4.2beta3. He’s working on a way to extend it to 4.2 and beyond. Just wait for him to work out his method.
  • iPhone 3G and 3GS unlockers will be covered by our upcoming unlock. Stay away from any updates to Apple FW until our official release and you’ll be okay. Just stay away from all Apple IPSWs :)
  • iPhone4 unlockers are not left out in the cold. @sherif_hashim has found some very promising avenues to pursue. Those will be explored as soon as possible after all the 4.2 madness.
What does this mean to you?
  • If you’re an unlocker, just stay where you are. Please, just stay where you are. Any mistakes you make now may be permanent.
  • If you only care about the jailbreak and you’re absolutely sure you have your personalized 4.1 SHSH hashes, feel free to experiment but keep in mind that any mistakes you make may result in your losing pictures or notes or bookmarks that you’d rather keep. Honestly unless you love living on the bleeding edge, it’s better to just wait for official updates from Cydia/redsn0w/PwnageTool.
  • Don’t buy or donate to any unlock or jailbreak scammers. Every legitimate solution you will find for unlocks or jailbreaks will be offered without an extended hand. That’s how this community works. It’s about freedom, not donations.

It looks like an untethered jailbreak is right around the corner. All X-Gold 608 devices (iPhone3G, iPhone3GS, iPad3G) will have a new unlock, and iPhone4 isn't too far behind... Please let us know what you are looking forward to....

[iPhoneDevTeam Blog]