is there anybody out there with the capability and interest to enrich gpsapp with a voice output (e.g. turn right in 200m)?

What we are lacking is a speech engine that is actually understandable. A while back I modified gpsapp to use ttsd to speak waypoints instructions at the same time it showed them on the screen. Unfortunately it was basically impossible to understand what it was saying in a moving vehicle. I never bothered to work all the bugs out and post the changes since it didn't seem to have much value. Maybe the newer version of flite is easier to understand?

-Mike