A few months ago, DreamHost was the only provider on Nancy McGough's list of IMAP providers at:
to get a thumbs up, signifying "a provider that I use and recommend," and one of a handful, along with such providers as panix.com, fastmail.fm, and mailsnare.net, to get a horizontal pointing finger, signifying "a provider that seems pretty good and I have recommended to friends." Indeed it was that thumbs up that played a huge part in my signing up with DreamHost.
More recently, DreamHost lost the thumbs up but retained the horizontal pointing finger. (DreamHost's loss of the thumbs up left McGough's list without a single provider to have earned that distinction.)
I looked again at the list today and, in a remarkable turnabout, DreamHost is now the only provider on the list to get a thumbs down, meaning "a provider that I recommend that you avoid."