As some of you already know, updating your iPhone to firmware 2.0.1 means that you've lost access to all your jailbroken apps. That's pretty much expected and should be rectified by the DevTeam soon enough. What's notable from an unlocking perspective, however, is that Apple's 2.0.1 release also updates the iPhone 3G baseband. This puts iPhone 3G owners in a bit of a quandary: update now via iTunes in desperate hopes of the stability and improved keyboard response we've been seeing but do so at the risk of not being able to unlock your iPhone 3G in the future (if and when the DevTeam gets around to releasing it for firmware 2.0). A lot can happen in the course of a 2 year (or longer) carrier commitment. According to the DevTeam, you'll get all the benefits of Apple's 2.0.1 update (without the pesky new baseband) just as soon as they can kick out the updated PwnageTool (current version is 2.0.1) onto the Internets. Decisions, decisions.

 

From:http://www.engadget.com