It would be interesting to know which sites go down how often... I setup a tracking-setup for my gallery webpage at http://host-tracker.com/.
Total downtown in the last 2 months... 3 hours 20 minutes. (Can't recall which problem that was... one particular announced downtime).
'Nothing seen other then that.
I think with the number of separate machines and number of different people this, OMFG WE'RE DOWN AGAIN posts are a bit over the top and falsly high because different people on different servers are associating them with dreamhost as a whole.
But.. who knows I may be wrong.