Hi all,

I am finally getting into crypto-currencies in any depth, though I've know about them since the DigiCash days when I hung out on the old cypherpunks mailing list.  I've quickly concluded I've missed the boat on mining bitcoins but may buy one as an novelty investment.  I'm going look into mining litecoins and peercoins.  What are some other alt-coins that look promising?  I've seen mentions of namecoin and primecoin but haven't researched them yet.  What are their special strengths?