I have a Festool CT33 and the price of the bags got me thinking of adding a Dust Deputy. I started investigating different methods of attachment to the Festool and came across an interesting thread in the Festool Owners Group forum. Search for the thread title "Dust Deputy (plastic) on Systainer & Festool CTL Midi".
Take a look at post #26 posted on 1/18/10. Its from Oneida stating that they will soon be releasing a Dust Deputy specifically designed for the Festool. They basically created something that looks like a systainer instead of the 5-gal bucket. It looks pretty nice.
If this has been posted before on SMC, my apologies.