I suspect at launch it'll be above MSRP (probably only $50-100 initially IMO), and then depending on supply and demand shift from there up or down.
The GF8800GT, HD3870 and GF8800GTS all launched very close to MSRP for the first tiny few sold, and then promptly went out of stock and then price jacked up $50+ and then when they were in stock again were still $50+ above MSRP.
I suspect if there's the same demand imbalance that we'll see the same situation again.