To comment on the value of the refurb store for those of us able to use the ed discount--it allows access to previous revs for pretty attractive prices.
For example, you can get a rev a 17" iMac G5 w/super for $999, which beats the hell out of $1399 new through the education store. Even factoring in the upgrades needed to make it "healthy", you get a very capable G5 system with a full warranty for a nearly unbeatable price.
You can get similar deals on PowerBooks, Power Macs, and iPods (less so with iBooks, eMacs, and Minis), so the refurb store does have SOME value for us school folk.