Is there a way to use the iblocklist's found here
I did find this http://www.pfsense.com/~sullrich/pics/SampleAlias.PNG but the url option does not seem to be present in the newer versions ( 1.2.2 ) ?
The newest release version of pfSense is 1.2.3-release which is what you should be using in production.
Adding something like iBlocklist is a feature coming in 2.0 which is currently in Beta. It's not quite ready for production, but its getting very close.