I wonder if there is (or soon will be) an Android app / dialer that lets you "call" people with a missed call. Based on the little international number dialer I use (substituting a cheaper dialing code for + according to your instructions), you'd be able to support general dialing actions (e.g. dialing a phone number recognized in an email or web page) and might even be able to adjust the call log so you see a single outbound call, rather than a "missed call" and its response separately. I can see that being fairly useful.