Some of you may be aware already of the DS9 rewatch
that started this week on Tor.com. It is being written by Keith R.D. DeCandido (KRAD), the noted Trek author and editor. Krad did Tor's TNG rewatch, which was really fun. It is an interesting review in that it is both a writer and a fan who is criticising the show, and the discussion below each episode is rather good too.
In addition, AV Club's DS9 rewatch
by Zach Handlen (a virgin watcher to the show) is into season 5, and well worth looking at too.