MCXnow could be compared, but really does anyone trade on there anymore? RealSolid is a crook. I was a newbie to the exchange right before he froze trade. I got coins out, but the deposit I had going in never got redeemed. I had several emails ignored, and IRC chat was useless. Try to call the guy out on his little trollbox and he will eat into you like an immature imp. Steer clear.
Cryptsy is probably an exchange that has similar trends of "mismanagement" as gox and I would not be shocked if they have problems in the future. I keep less than a BTC worth of coins on there.
I was thinking Cryptsy too.
I've seen numerous posts about Cryptsy withdrawals getting frozen and coin balances going into the negatives for no apparent reason.
I wouldn't be surprised if they don't have the coins to back everything if everyone withdraws at the same time.