Humm, for points #1 and #2, you can just go to the contact's card in the contacts application, click on the menu and choose 'communication history', you'll get a full history of all communications (send/received/missed calls, sms and IM too). It can be annoying though if you used IM with someone, and you have to scroll through your whole log in the communication history. But it can be helpful for you to know from which phone someone called you, or to know at what time you got that missed call.