Does this alert/alarm/notification app exist?

Hi.

I am using a droid bionic.

I need an app or apps that will do the following:

1) Allow me to dismiss a text message with a press of the volume button (like what happens with the ringer alert)

2) Allow me to dismiss a "missed call" alert - which currently just alerts forever no matter what it do until the alert runs out.

3) Allow me to customize my "missed call" alert so that it is not the same alert as all of my other text messages.

4) Allow me to set unique notification tones for emails from different people, so I know who is emailing me without having to look at the phone.

Perhaps I am missing my blackberry too much (which could do all of the above), but I would really like these capabilities on the android phone.

Can I get all or some of these features without losing other features?

Is there any app that will allow more customizable functions for the alerts, alarms, notifications?

Thanks!
Juggernaut