Hi, I'm back with a few more!  Slowly making my way through.

> 17. Reject if transaction fee (defined as sum of input values minus sum of output values) would be too low to get into an empty block

Last I saw 0 transaction fees are allowed.  Is this correct as a minimum?

Also, is COINBASE_MATURITY still = 100 ?

What's the best place to find the current value of these magic numbers and get notified when they change?  I've been able to google some of them in the official client code on github, but was just curious.

Thanks for the help!