Hey guys. I've found a private key that matches with a Bitcoin address with funds that I do not own. It is the result to use the passphrase "Bitcoin" in the Brainwallet address generator. The private key is 5KBZytdkzttdedEB7xLom6YnHRCVTNQPUrJiTDJKS7VJUbiX6Di, and the address is 1Q7zx6cUVXDZpAJHgPQwbbZUfTKFFuEV6z.
I've tried to import this key into several wallets, but none of those is able to load the available amount of Bitcoins, so I can't spend them. If you check it in the Blockchain what you find out is that it is full of unconfirmed transactions of 0.00001 BTC. Later on I found this same key in a post talking about spam. Could you tell me what's going on with it? Just curious.

https://brainwallet.org/
http://blockchain.info/address/1Q7zx6cUVXDZpAJHgPQwbbZUfTKFFuEV6z

By the way, as this Bitcoins do not belong to me I am not interested in keeping them. I only want to try the Bitcoin system. I guess that posting the private address is a good proof of it.