I0coin actually moved into third place today for network hash rate as shown on Vircurex.com.  Hash rate has tripled in just the last two weeks.  We'll see if it continues.
   
Bitcoin      381,995,560.9034   GH/s
Namecoin    89,047,599.0940   GH/s
I0coin         62,161,153.8629   GH/s
Ixcoin         58,586,868.5717   GH/s
Devcoin        9,944,390.5284   GH/s