Not true. There's just lots of other identical topics with the titles "help me", "please help me", "omg I need the help", so sometimes topics slip by unnoticed.
On your mac, the easiest way to unlock would be via pwnage tool. Here's a
tutorial. Everything will get blankwiped off your phone, so let itunes do a backup before-hand. This should save your contacts, but just incase, write them down somewhere since every now and then the backup files do get corrupted. To get your music back on, you'd have to somehow transfer it all to your mac if you wish to use it as your primary computer, since a backup does not save those files.
1.1.4 apps do not work on 2.0, some of them have been ported over, but not all of them; so keep this in mind while updating. (You WILL lose a majority of your apps).