As the 2.2 iPhone firmware release draws near, the iPhone Dev Team is once again suggesting that jailbreak users delay upgrading. Each firmware release in the past has broken jailbreaks, taking time for the team to tunnel past Apple's locks to restore the minty fresh goodness of Open SSH access and Installer/Cydia software distribution via the friendly PwnApple.

In a recent blog post, the dev team has singled out 3G iPhone users hoping for unlocks. The team, which has been working on the 3G unlock since it launched suggests that 2.2 may bring with it more than just the usual re-jailbreaking challenge, although the team members do not provide details as to what that additional roadblock might be.

At this time, you can jailbreak your iPhone 3G but you cannot software-unlock it. Their Pwnage application will, however, software-unlock any first-generation iPhone. As most of you know, unlocking allows you to use your iPhone with any GSM carrier including T-Mobile in the US and a wide range of carriers outside the US.