How about including some transactions in the 4th block?! The future will need more fees than generation rewards... and you're missing the whole idea of mining...
If there are no transactions being recorded, that is a
major design problem.
this is currently being worked on. see
https://github.com/bitcoin/bitcoin/pull/476 and the forum thread referenced therein.
One hopes so.
Until then, p2pool is actively DoS'ing the bitcoin network, by delaying transactions until a non-p2pool miner builds a block.
That is very harmful to the network.