Well i didnt quite get the troll feeling from your post because i have had the same problem as you.
I think because you used the words run/walk and galloway people think your not fast and thus dont deserve an actual response.
I've done a number of fartlek type workouts and set my watch to beep accordingly and I've found it to be hard to hear the beep especially if i'm running near a road at the time. I don't know about earphone but i've thought about watches having a bigger speaker for the beeps but I haven't seen anything. If you did have an ipod you might be able to use the nike training stuff and set it to beep but I don't know for sure since i dont actually have an ipod. I did just get a new Garmin 405 and I think the beep is pretty loud compared to my older watches.