We're running DotNetNuke 5.6.2 right now, they've had 5.6.3 out for sometime, but I've been waiting for 6.0 to be released and confirmed it's stable.
6.0 is stable and we're gonna try updating to that now. Apparently it's not as easy as one would think.
If the site is down, this is why. I've done the upgrade on PackersBeta.com no problem, but when I tried PackersHome.com it failed, miserably.
I'm going to run some more testing, trial by fire on SilentShouting.com in the mean time. If things go well, I'll try this site, again.