There's just been a favourable piece about Glitch on the Boing Boing blog, including a link to an interesting review.
Most of the comments so far on BB seem to be from players who tried Glitch and didn't like it much, including one who specifically said he didn't want to interact with other players when gaming. Well, I can see how Glitch wasn't for him.
Anyone here who wants to comment needs to visit
boingboing.net/?s=glitch.com
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(I'm MadLogician on that list)