1) Please add the ability to search for errors. Having to scroll through the pages when finding some old error is quite annoying. Or trying to find all errors with a specific exception.
2) More notification settings in the Android app. I would like to be able to change the notification sound and disable vibration. Right now I have worked around this by disabling notifications in the app and assigning label in Gmail to Opbeat email notifications and setting custom notification settings for this label.
3) It would be great to see the "Misc." and "Extra" tabs in addition to the stacktrace in the Android app. We include some useful information about the errors in the extra section and it would be helpful to take a look at them right in the app.