Sample output:
bfgminer version 3.0.2 - Started: [2013-04-19 18:33:55] - [ 4 days 03:20:01]
--------------------------------------------------------------------------------
[b] 5s:29.55 avg:29.44 u:28.13 Gh/s[/b] | A:291464 R:543 S:0 HW:0 U:48.9/m BS:85.1M
Luke-Jr, what does "5s" (last 5 seconds?), "avg" (probably average hashrate since started mining) and "u" (this one I have no idea)