Notcom (creator of TinyUmbrella) just linked to this tutorial explaining how to upgrade to iPhone 4.1 without upgrading your baseband so that you won't piss away your unlock!
http://tap4.us/k7d (via http://thefirmwareumbrella.blogspot.com/)
Just did it and it worked for me!
http://tap4.us/k7d (via http://thefirmwareumbrella.blogspot.com/)
Just did it and it worked for me!