Tarun

Apple Releases 3G iPhone Friday: This One Has Greater Mass Appeal

Jailbroken doesn't mean unlocked. Jailbroken simply implies that you have gotten root and/or (at a bare minimum) write access to various parts of the MBR and the hard drive that were previously restricted. Unlocking refers to manipulating the software that controls the SIM (System Information Module; found on all GSM phones) so that the SIM reader will accept and read any SIM (i.e. from another network) that the user puts in the phone.

There's a huge difference as the unlocking community is for-profit and the jailbreaking community is a non-profit, open source group.