what's interesting to me is that all these full blocks that have been coming more frequently and consecutively have not caused any block delays.  that is good news b/c there are some who thought that as we filled the 1MB limit, there might be delays and have pointed to just this mechanism in the past when we've had such delays.  so we know 1MB blocks don't slow down the network.  so just how high can we push this limit w/o breaking it?