So I've been trying to figure out.. just how many coins did
1HZNsUqQxKVLmfPfCAzLwrnVDzx8CxwxnM
receive?

It seems like this should be a matter of public record, and objectively verifiable by anyone.

It would be interesting to see how many blocks (before open source) the CUDA client generated.  If each block sent 5 BTC to the address above, that should be easy math, right?

I just can't figure out how to get a total tally of coins to a specific address.  Is there a tool for that?