Shoutbox

I'm working on a mail popper plugin the idea is that you can use your pop3 account to show a popup when you recieve new mail(s). It makes it different from the msgplus! pop3 notifier because with this plugin you can customize the popup title, text, sound, application with tags, like %1 for new messages count and %2 for recieve date/time %3 for subject %4 for From etc....it works already now, but the problem is I can't see if someone is logged in. If you start msn messenger the plugin will automaticly check for new mail(or after a delay) because it can't see if someone is logged in. And perhaps it would be nice to retrieve de user ID or passport or something to make seperate user settings.

All this can be done with messenger API I know, but I would really like to see another way to check if someone is logged in, and better..WHO is logged in. So without the use of messenger API.