I lost all hope to get Skype running on my PRE2.
Somehow I have missed this news. HP has released WebOS 2.2.4 … also for the PRE2. Tonight I have installed it. The most important thing is the Skype-support. And yes it is perfectly integrated. Messages can be sent with the messaging-app and calls can be made directly from the addressbook or the dial-app.
I have also recognized some smaller improvements like the receiving-date and -time in the popup-menu of a message and the new SIM-pin-request-screen that does now look exactly as the phone-pin-request-screen.