I have been interested in instanteous stats for a long time.  I have
modified several 1.2 drivers to record the bytes and packets in an out
and provided ioctl's to get(and/or reset) these numbers.  Then I wrote
a user level program like vmstat to get these numbers every n seconds.

I can post these changes for ep and ed if anyone is curious.  (The 
real riddle is why does the out traffic occassionally drop to zero
packets for a second or two during a transfer.)