If you send smaller transactions to yourself you can combine the dust transactions and create larger inputs.
OK, I've sent the largest amount that I was able (200 mBTC, with a fee of 16 mBTC) to a new address in my wallet. If I try to move any of the remainder, it will be largely eaten up by high fees.
It seems to me that this problem is going to affect tens of thousands of users who are frantically collecting as much bitdust as they can from all the free BTC websites. They will end up with a large balance that will be difficult or impossible to spend.