I agree with the points you all have made. While the Nevada supercharges show on the map as being completed by the end of 2014, there has been absolutely no indication that they are indeed in process. Of more concern, it does not seem that the two shown on the map would be sufficient to complete the connection to Salt Lake City. While I agree that superchargers that allow medium length trips from home would be useful (especially up the North Coast of California, where there are very few chargers of any sort), it seems that with only 3 or 4 superchargers across Nevada Tesla would open up access to the entire national supercharger network to Northern Californians. I have to think that quite a few people, like myself, would be interested in cross country trips next Spring And Summer if we could go directly and not have to detour through Southern California.
I think it's a question of priorities - how many people take cross-country road trips versus the number that take weekend trips? If you provide robust SC networks around major urban concentrations of Teslas out to a radius of say 350 miles, then you already have an embryo SC network in place that just requires a few extra ones to make the connection between clusters.
For example, take I-10 from Texas to Florida. Connecting Houston to New Orleans, New Orleans to Mobile, and Jacksonville to Tallahassee, you only need a few more to join up Houston to Jacksonville. I-70 is even more obvious; Join up St. Louis to Kansas City and Indianapolis with just one or two SCs in between each, and you can connect off both ends.
My biggest pet peeve is I-90 in the Northwest. Does it really make more sense to complete I-90 from Seattle through to Minnesota across some of the least populated and lowest density states in the lower 48, before I-90 from Cleveland to Boston? I mean, New York supposedly comes in 2nd to California in the number of Teslas, so why is Tesla building out Montana now? It's 770 miles from Seattle to Old Faithful, but only 350 miles from SLC ditto, so why aren't I-15, U.S. 20 and 26 north of SLC higher priority than I-90 across Idaho and Montana? And so on.
Personally, I feel that if taking a family road trip was so important to Elon, he should have paid for the 7 SCs in MN, SD, and WY out of his own pocket (they should have been used for I-70 or I-80/76 between Chicago-Denver instead), until such time as I-90 is complete across the country, when he should be reimbursed (but not before 12/31/2015 at the earliest). He can certainly afford it.