Re: S.DICE - Want a piece of SatoshiDICE? IPO this week before new site launch!
Maybe I would invest into this but being on MPEX is risky as hell and I don't want to support spamming of the blockchain with huge amounts transactions either (my SSD drive has only 128 GB). 
SatoshiDICE pays for every transaction it makes. To date, it is the largest supporter of miners in the bitcoin economy. The majority of all mining fees ever have been paid by SatoshiDICE.