This is not an advertisement, as I am not selling these, but I notice a lot of people have been asking how to unlock it (3g with 2.30 baseband). I went out and purchased this off ebay :
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWNX:IT&item=270355784039
GEVEY 3G PLUS 2 TURBO UNLOCK 2.2.1 FW & 2.30 3G IPHONE
so for those of you asking how to unlock your 3g, this would be it.
cheap, easy, and I didn't have to do squat! It even carried over my jailbroken stuff from my 2g phone. (cydia/installer/etc).

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWNX:IT&item=270355784039
GEVEY 3G PLUS 2 TURBO UNLOCK 2.2.1 FW & 2.30 3G IPHONE
so for those of you asking how to unlock your 3g, this would be it.
cheap, easy, and I didn't have to do squat! It even carried over my jailbroken stuff from my 2g phone. (cydia/installer/etc).