scriptygoddess(Post updated and time stamp adjusted)
I wanted to adjust this post and move it to the current time, because this script is just too cool but specifically relevant to my original post…
Lynda has a script that will not only display how many users are online, but using the MT cookie information, display WHO is online.
—————-Original Post—————-
Another one that's been around for awhile – but I wanted to bookmark it because I plan on adding it to one of my sites the next time I'm bored. 
Show the number of users online
[via Jenni – as well as many people, I'm sure – but when I went looking for it this morning, I knew Jenni used it and had a cheat sheat of all the scripts she uses, so I knew it'd be easy to track down on her site]
(that was the longest credit line ever)
updates (I'll add to this list as I find more)
I just noticed that Melissa uses nerdsonsite
