who are on my page atm?

[aragonjcw]

I have a page where users can be guest or registered users. I want to find out who are online, and how many guests are on my page atm... Something like this:

Online now:
4 guests
3 members

(Bruce, Pete)

[Anon]

You can't know when someone logs off (unless you provide them with a "Log Off" link), but you can get a rough estimate if you keep a count of the members and guests that came in the last 15 minutes.

Diego

[aragonjcw]

I thought of a field in the member-table named lastAction, that contains a timestamp of last pageview that person made...Then It counts every member where the timestamp is more recent than 10-15 minutes or so..

The guest thing ain't that important..

Any other ideas?