How often do you look at Who's Online? Why?
I check it out when I run out of things to post and want to see what other people are doing. Often I find people who I haven't seen in ages (hi, Mo-Nercy, me and Jiro totally saw you) and sometimes I spot people that I feel I could get to know better, so leave them a Visitor Message. Which I totally encourage everyone to do right now, by the way - go check Who's Online and leave someone you don't know well a VM. But yeah. Sometimes people are looking at threads I haven't seen, too, and sometimes I just notice that there are bugger all people online and I shouldn't hold out hope of someone posting again anytime soon and that I should probably get back to work.
But yeah. What about you? Do you take note of Who's Online?