Current top ten:
Bitcoin
(Ripple)
Litecoin
Peercoin
Namecoin
Quark
ProtoShares
WorldCoin
Megacoin
Primecoin
Feathercoin
Megacoin has returned.  The general slide continues - at the moment the only coin on the whole chart that shows a 24 hour gain is BetaCoin.
Nice thread.  
Here's my take.
Bitcoin <- Solid/  8 billion market cap.  Undervalued.
(Ripple)
Litecoin <- Solid.  Weakness in sympathy with Bitcoin.  GPU cards all selling for 80% premium.   
Peercoin  <-  Should decline based on high miner subsidy.
Namecoin  <-  Undervalued at 31 million, should overtake Peercoin
Quark <-  Too few holder, too new.  Should decline as insiders cash out.
ProtoShares <-  Too early, too few coins.  New coins typically decline over time as miners sell and push price lower.  
WorldCoin <-  Too fast block rate, too many coins, will decline over time.
Megacoin <- Similar to quark.  Insiders will cash out.
Primecoin <- Flawed experimental coin.  I doubt the upside.
Feathercoin <- Lots of community, weak developers.  Lots of insiders.  Been taking a major punishment.  Not sure where this will go.