Be prepared for long lines and shortages.

Apple will officially begin selling its iPhone 3GS on Friday, but some analysts are predicting shortages that could leave some consumers disappointed. If advance orders are any indication, the demand for the iPhone 3GS may outstrip the at-launch supply.

AT&T, the exclusive carrier of the iPhone in the United States, and Best Buy have sold out of inventories for Apple’s latest smartphone.

Apple was still taking orders on its Web site Tuesday, but the June 19 delivery date is not a guarantee. Likewise, AT&T posted a message on its Web site that indicates advance orders will shop seven to 14 days after the order is placed — on a first-come, first-served basis.

I won’t be in any line nor will I be worried about the status of product in stock. I have an iPhone 3G that is a little more than 6 months old, so you know what that means. Yep, I’m stuck in AT&T contract hell. And there’s no way in hell I’ll be shelling out $400 for a new phone. And I won’t buy my way out of the contract either. That’s the way it is.

Yeah, there are ways to get an iPhone 3GS for less, but as far as I’m concerned, the hassles are just too great. So, have fun you new iPhone 3GS users. Have fun with your compass and your 3.0 megapixel camera. I’ll be joining you in another year…maybe.