here's another angle...
what if Sprint is passing around the word of an Aug/Sept/Oct release for the 6800 so that people get used to the idea ... but, they've been working on the WM6 and/or RevA updates already and the 6800 comes out in early June. Then Sprint can say, "Look, we told you later in the year, but we actually got the device out a lot sooner."
at least this is what I keep telling myself to counteract the agony of a long and drawn out wait before the 6800 is really released.