1. I'm not sure what you are talking about. If it is Yahoo related it is coming too. Otherwise I'm not sure what you mean.
2. My understanding from speaking with Cingular executives is that MMS is coming for the BlackBerry. It is still in testing and I don't think they have upgraded all their BlackBerry servers yet. We will probably get it when the release the new BIS.
3. I have placed several calls and never had this happen.
4. No experience with number 4.