iPhone 3G must be activated in-store

It looks like you won't be able to buy the iPhone 3G from SingTel for your friends or family members when it comes out later this year. According to this Q&A with a spokesperson for AT&T who are selling the iPhone 3G in the US, the phone must be activated in-store. From Engadget:

Chris asks: Can these devices be purchased and given as gifts?

No. You will need to walk out of the AT&T or Apple store with the device activated.

Greekjgg asks: What if I want to buy one for work which already uses AT&T for company account? I can't activate in store, obviously, so will it be possible to to buy without a contract?

We don't have details yet but iPhones for business use will likely be provisioned through your company's IT department.

Tons of people ask: If I purchase an original iPhone from a friend will I be able to get the old data plan pricing? Or will I need to sign up at the new, more expensive rate?

Yes. You can get the old data plan price if someone gives you a device and you establish service for yourself.

Previously: Reserve your iPhone 3G now!