Just check the htc download site and nothing there yet. But the sprint support site is undergoing maintenance, so maybe the are putting it on their download page soon.
I used to do the "update watch" with my Pre, now I watch you guys and wait until I see hundred or so posts here saying that the update installed successfully.
My guess is that the update will be released when Sprint's call center is fully staffed...in case there we any problems. Sprint's headquarters is in the central timezone. Full staffing might be at 8 central, perhaps?
7:00am here in CO, tried several times earlier and the update now there! Unfortunately for me I am not on wifi or 4G so no clue how long this is going to take :'(