For existing AT&T subscribers looking to get a new handset for a few months before they make that inevitable Pre / iPhone 3.0 / Gizmondo decision this summer — or folks who just despise contracts in general — it looks like AT&T will be offering unsubsidized iPhone 3Gs at last.

According to some training slides obtained by The Boy Genius, the “no-commit” price will only be available to existing customers, and will run them $599 for the 8GB model and $699 for the 16GB. Sounds like somebody’s looking to flush a bit of stock, or perhaps they’ve finally decided to almost treat the phone like pretty much every single other device on the market — wild times we’re living in, folks. The no-commit option should be available as of March 26th.

AT&T and Apple have detailed how the launch of the iPhone 3G S will work come June 19, and it looks like those who don’t preorder the phone will be getting the shaft.

Apple will be opening their stores a little early at 8AM. This will all those who preorder the phone to come in early and grab their new overpriced paperweight.

Those going through AT&T to get the new phone have a little bit more to deal with. If you preorder the phone then it might not be so bad as you will be able to line up early and get priority to get your phone on launch day. Those who don’t preorder will have to wait until the store opens and have to wait for all the preorders to be fulfilled first.

It sure isn’t going to be cheap either. New AT&T customers or those eligible for their upgrade will be able to get the new iPhone for $199/$299 for the 16GB/32GB versions. If you aren’t eligible for the upgrade are going to have to cough up a lot more dough however as it will be between $399/$499 and $599/$699 for the 16GB and 32GB models respectively, all depending on how much time is left on your two year contract.