possible statistics:

unique visitors today

unique visitors that resulted in user account login/creation today

unique visitors that appear to be crawler, bot, or SkyNet today

unique visitors/users in past (time period)

unique visitors of previous statistics in (time period)

current rate of posts per day

current rate of user login in (time period) ("3 users have made a total of 15 user logins today")

uptime

you downloaded this page in (this many) seconds for a speed of (this many) megabytes per second (basically, different than rendered in x seconds, not that that isn't a useful stat)