I think they will have an online rebate. But thats just a guess on my part. They may figure that the phone will be super popular and not offer one though.
And for a $300 dollar phone, I'd imagine the rebate to be around $50.(if one is offered)
So MSRP and in store price of $299 (online with rebate $249). Total guess on my part of course.
Don't forget if your pretty sure your gong to pick one up, you can register online now and they will send you a code for free overnight shipping when released.
**Note: while prices online are usualy a bit cheeper, if they are close. I'd urge you to support your local dealers first.**