In order of best return on time to put up IMO:

Grandcoin
Philisopherstone
Hobonickels
Lebowkis
Casinocoin
Anoncoin
Androidstoken
Craftcoin
Valuecoin
Mincoin
Gil
Novacoin
Litecoin
Krugercoin
Stablecoin
PPCoin
Namecoin
Devcoin
Bytecoin
I0coin

I would really like to see a BTC pool with as many of these Sha256 coins on merged mining as possible... do that, and get some of these more profitable Scrypt coins going, and you will have a ton of newcomers.

P.S.

You may also want to look at:

Scrypt-Jane: CENT, Gold Pressed Latinum

To be continued...