Just added another feature to the script.
You can now use an URL like,
http://psstatus.uglyhorst.de/MyForumName:These,Are,My,Characters.png
and it will show only "MyForumName is currently online." if one of your characters is, or "~ offline" if all are offline.
For example,
http://psstatus.uglyhorst.de/derula:Jamona,Togh,Aburan,Jana.png
will only show my nickname, displaying it as online, if either of the specified characters is logged in, or offline otherwise:
If you only specify an alias and a single character name, it works as well.
I also fixed a few bugs that would occur when the script fails to determine the online status of people.
(Btw., my offer to replace anyone's text online description with an image is still there, and extended to multiple characters. That was also the point of this update)