That's just excellent work. I'm surprised it generated so little buzz and isn't adopted into the official client until now.

On a separate note, Suggester suggests a Redistribute coins button, an option which moves all your funds to a chosen number of new wallets with the desired proportion of your current coins assigned for each. A user would then be able to consolidate his wealth from all his, say, 17 addresses into just 3 new ones, with the first one containing 49% of his coins, the second one 26%, and the third 25% (he will be able to assign those %'s arbitrarily using a simple interface). Similarly, he might want to break up his single wallet into, say, 4 different wallets, using them for 4 different purposes. When the transactions clear after 10 minutes, it'll be harder for anyone to prove that this user still owns the coins previously associated with his identity.

For the suggestion to be practical for anonymity purposes though, I strongly recommend another adjustable option where the user chooses how much time to assign for the whole operation. For example, choosing "63.2 hours" would move random chunks of the coins into their new distribution over that period of time (the client would have to be connected for the whole duration). That would make plausible deniability much stronger because you usually don't have 17 people simultaneously sending all their coins to 3 new addresses! If done correctly, it will be virtually impossible after that for anyone to prove that he still owns the coins. We're essentially simulating a change-of-ownership.

This can all be currently done using windows explorer and separate wallet files, but it'll be a big pain in the butt.