[via iclarified.com]

Geohot has posted the first screenshot of his blacksn0w unlock for the iPhone 3G and 3GS. The unlock which will be run after completing a jailbreak with the blackra1n jailbreak is expected to be released on November 4th.

Blacksn0w does support the latest 05.11.07 baseband so for those who accidentally upgraded, you will be able to get your unlock back.