The altcoin community is abuzz this week with news of primecoin, a new altcoin.
Primecoin is different from other bitcoin clones as instead of being a standard hashcash type of coin Primecoin's miners are calculating prime number chains to find blocks.
Primecoin has risen to a peak of .015 BTC per XPM and currently sits at about .01 BTC per XPM.
Primecoin is currently traded on most alt exchanges like coins-e and cryptsy (down at the time of this post). You can learn more about it at Reddit Primecoin which is an active community or download the latest and fastest wallet at this Sourceforge.net for linux and This one for windows