Ring volume
Around the office there are several ringtones that are just too loud. Drives people crazy. The most ordinary of ringtones can be awful if it's too loud.
When I'm at work, my phone sits in its cradle just a few inches from my keyboard. If it rings, I'm going to know. I don't need to have the volume very high at all.
But then when I get up from my desk, and go and talk to someone, or pop out to get some lunch, or go to a User Group meeting, I typically forget to turn the volume up. So I miss calls. Or Greg Linwood misses calls when we're waiting for Chuck to phone back for the webcast (which by the way, seems to have lost the audio completely now - hopefully we'll have more luck next time). Point is - when there's other noise around the place, I want the phone to be louder.
It already handles volume adjustment if I'm talking into it and it detects that it needs a gain change, so I think it should detect the ambient noise and make the ringtone louder! If I'm in my car, it should belt out its ringtone as if I'm hearing impaired. If I'm somewhere quiet, it should do a modest little ring. I don't want it to start quiet and get louder - it will have probably gone to voice-mail by then anyway. And I figure that since my phone is a PocketPC, I should just be able to patch it to have this. Or even find an API that would let me program the phone to do it myself (you know, in all that spare time I have!)