Comment 4 for bug 1261507

I think the idea is mostly documented in this page: https://gist.github.com/gavinandresen/2961409

As Michael said, the transaction fee is currently 100 μBTC, which is the standard fee coded into the network. It's possible that a lower fee could be used without any negative effects though, so we'll look at lowering the default fee until the new transaction system is put into place.