I have some ideas of apps which would
improve the E6!

Perhaps a developer finds these ideas useful too?

- Missed call reminder
Previously I had a Motorola v3. If you missed a call it produced a beep
every minute or so. I personally like this feature, because you have not
to look at the display everytime. The phone informes you by sound.

- Daytime customable ringstyle switcher.
I use the "loud ring"-style over the day and switch to "soft ring" in the
evening. Sometimes I forget to change the setting so either I miss a call
because of low volume "soft ring" the next day
or while snoozing in front of the TV late night and a call comes in I fell
almost from the sofa because of the loud sound effect.
So a tool which would be customable to switch these settings
automatically regarding to the daytime would be useful.