cocoaforge

Maybe it's a good idea to make them back normal when you become active
My problem is one with Adium, when someone comes online while I'm idle, the the note becomes sticky and when I click on it the chat window appears, so I think it is better to change them back to normal notes when the user becomes active again.

I believe that you can option click the notifications so that they go away without bringing the chat window forward.

You can also turn off the option that makes the notifications sticky in the preferences.

In .8 we'll have a close widget for notifications

Is it possible to make the 30s user customisable?

It should already be, if not, it is in 1.1 (which is the release version for "0.8")