While Orange seems to be holding out until the last minute to announce exactly how much its unlocked iPhone will cost, France Telecom CEO Didier Lombard has apparently dropped a few less-than-specific details on the matter in a recent interview, saying that it'll cost "over 500 euros, but well below 1,000 euros." Or, in US dollars, roughly somewhere between $740 and $1,500, but apparently closer to the former. A bit pricey to be sure, but it would certainly be cheaper than the €999 unlocked iPhone that T-Mobile is selling in Germany.
As previously announced, a locked iPhone on Orange (complete with a two-year contract) will set you back €399. Look for things to get fleshed out further when Orange gets official with its iPhone offerings on Thursday.