May I suggest you rename it to trail analysis or something else. Taint has unfortunately become a pretty loaded word and will probably give the wrong idea to quite a few people.
Taint is already a word i've heard mentioned a few times when discussing coin origins. Maybe Source Analysis.
Apparently there is only a 5.7942159848% that this address is connected to itself. That seems wrong.
I tweaked the algorithm a bit and not it correctly(?) shows
1HZY2Bks6HjTXFxXSj8ivhWCnkosypiUxR as the top source address.
The branch column attempts to colour code related transactions and if numbered shows the number of unique root branches that address has appeared in. By unique branches I mean descendants of transactions which directly pay into to the address. Anything with a count > 0 usually indicates a stronger relationship with the target address.
For example My Address: http://blockchain.info/taint/1A8JiWcwvpY7tAopUkSnGuEYHmzGYfZPiq
shows branch counts > 0 for these addresses.
These are addresses I also commonly use for testing and such and are in the same wallet. It does also show a high branch count for Deppbit (1VayNert3x1KzbpzMGt2qdqrAThiRovi8) which you will find to be true of many addresses as a large % of coins tend to originate from deepbit. Also the top ip is listed as 127.0.0.1 because I use My Wallet to make transactions so they are broadcast from localhost.
The genesis transaction will be rather interesting as it has no history. It would be interesting to do an analysis on the first few thousand generation transactions, at least some of them must have moved.
P.S. Thank you to the recent donators.