I think it would be a good addition. If an address has been compromised, it might be well worth it to a person to automatically add a small fee to process any incoming transactions and have that much more of an edge against whoever else also has the private key. I think to avoid spending extra Bitcoins, simply disable the fee if the incoming transaction is smaller than the fee is set to.
Thanks for the extra information.
I believe if we add a 0.0005 BTC fee for any transfer below 0.01 BTC but > 0.0005 BTC, it should speed up things a lot.
We'll add a setting to enable this soon. Problem is this will be enabled account-wide, and not per address (because there is no way to modify an address afterward).
For transfers <= 0.0005 BTC, I guess the only solution is to wait for multiple ones to appear until sum > 0.0005
Cool! It's not perfect, but certainly a better solution than what we have now.
To be clear, this fee would apply to both MtGox-generated addresses and user-imported addresses?