When calling out, I show a dialog with two buttons: abort and done. This way the user can cancel the dial out. I usually need this for those times when GV tries to call my gizmo account and that SIP account is disconnected or having network issues - which happens too often for me.

Now when it _does_ work, I'm left with a dialog box that I cannot easily dismiss because the N900's processor time is entirely taken over by the phone call. Once the callback phone call has reached the n900, I can dismiss the callback by accepting the call and then hanging up.
In other words, that dialog box is a redundant nuisance once the phone rings.
Dismissing it is extremely important for ease of use.

As you mentioned, I will be using the observer as a trigger point to update history, but before that I plan to integrate desktop (Linux and Windows) Skype funtionality which I RnD-eed a long time ago.

I also need to get the symbian version working and tested.
(Any volunteers?)