if it is possible to have total number of nodes in the network,
it sure would look nice
top 21 addresses by size

top 21 transactions of the last block
average transaction size in the last block
total number of transaction in last block
time elapsed after last discovered block and name of the pool that mined it
hourly
% of the price change from the daily weighted average
weekly
monthly
yearly
total sum of all bids and asks on all exchanges combined