i updated this morning(only once). And the only issue i saw was the thrid party widgets got wacked. I trashed them, then re-installed them on the home pages and all is well.
I have noticed greatly improved battery life, phone is actually faster and smoother, WiMax is actually much faster in my area(Jacksonville). I am able to get a consistent 6-10mbps since the update. I was only averaging 3-6 mbps before. Wireless tethering still works over 4G as does normal tethering(which I'm doing as i write this).
It sucks that this update didn't work for some. Sprint is replacing my phone tomorrow due to screen lifting issues(light escaping lower left corner), but i'm almost tempted to keep my 002 hardware version Evo, just because it's working great and has the new, working update.
I'm sure this will get worked out soon, Sprint and HTC are not going to let this bring them down. The Evo is the hot ish and Sprint can't afford to loose the momentum gained with the release of their 4G network and the Evo.
Here is a screen shot of a 4G speedtest i took earlier. This is right in the middle of what i've seen since this am, after the update. This is with only 2 bars of 4G reception too.
edit: link wont work for screenshot. It was 9.23mbps.