iPhone Dev Team member musclenerd has been working on an iPhone 4 carrier unlock for quite some time and has now updated that the progress is steady, updating eager iPhone 4 users waiting for an carrier-unlock he tweeted :

Steady iPhone4 unlock progress with @planetbeing...custom "pp" command to dump thread priorities: http://is.gd/dirUZ

In less then 24 hours after release of the iPhone OS 4.0 Developer Preview, iPhone Dev Team member MuscleNerd has successfully jail-broken the operating-system and installed Veency VNC application on the iDevice.

MuscleNerd also posted a video showing the jailbroken iPhone OS 4.0 running Veency (A Cydia hosted app), you can checkout the video as posted ahead. There is no expected time-frame for a public release but things look very much on track and an proper iPhone OS 4.0 Jailbreak seems eminent in future.

Just moments ago iPhone Dev Team released the redsn0w 0.9 public beta download for Windows and Mac, supporting the latest iPhone OS 3.1.2 the cross-platform jailbreaking and unlocking utility for iPhone and iPod Touch also supports customizations like changing of device boot logo, recovery logo, and allows users to switch on “verbose” booting mode.

The free standalone utility does not use iTunes and no custom IPSW's are involved in the process, the current beta supports all iPhones and iPod touches except the iPod touch 3G having Apple firmware 3.0 and 3.1.2, direct download links are at the end of this post.

The iPhone cracker group iPhone Dev Team have made a significant progress in hacking into Apple iPhone 3G baseband required for unlocking of iPhone 3G, the group posted pictures and videos demonstrating their success, Apple iPhone earlier version can be jailbroken and unlocked using group's PwNage utility.

The famous iPhone Dev Team have released another iPhone Jailbreaking utility - "QuickPwn", as the name suggest the Windows only batch files let users jailbreak iPhone more quickly and easily without requiring a full restore, the software is labeled as pre-release developmental snapshot so better handle with care.