I understand this technique works with pretty much all 3G phones that are network locked... though you might need a different chip for each individual phone.

It's supposed to have been quite a popular technique to get around network locks of phones which are 3G.

These devices have been around for a while, generally cost <$20. You can get them for RIM, Nokia and others meaning an automatic "unlock" of a phone without tampering. Perfect :)

Keys to the flat?
Indehiscent Proposals
Indigesticulations
One gal's boxty is another's tawty.
Boxty on the griddle, 
Boxty in the pan,
If you can't make boxty,
You'll never get the man.

Pa send me money now
I've got to make it somehow
I need another chance

It's basically http://www.simable.com/ for an iPhone... With a more scary looking hole punch!