I'm with SoFLO on this one. I think $300 is the magic number Sprint is going to be looking at. I hope it comes in around $200, but with all the bells and whistles associated, 4G, HDMI out, etc, etc, etc... I wouldn't be surprised to see this crest 300 or more. Remember, this is Sprint's Halo device, and they can always say "if you don't want to pay that much, there's the Hero (or Hero 2 as was rumored) Moment, Nexus 1, etc..."
My thought is that this is the finest of lines for Sprint to walk. Sure they want to get as much money as they can for this thing. It certainly would warrants a large price point with all the features it contains. But Sprint needs customers, and happy ones at that, more than anything else. They have been doing a good job trying to turn around their image; improving customer service, first 4G roll-out, now cutting-edge hardware, even eliminating some wasteful spending at corporate headquarters. All this will be for not if the EVO doesn't deliver.
After the unveiling today, I, along with most everyone on here, can confidently say that the device itself is a home run (I'm getting it regardless). But the when and how much are just as important questions that need answers. Us Android Uber-geeks are the minority as far as the major carriers are concerned. And there just isn't the massive cult following of Apple. Get it right Sprint, and you could definitely be the big winner in all of this.