I wanted a map embedded in my blog that I could update with a location-based waypoint on a regular basis, using my droid. With the help of some smart folk on Google+, I figured out how to do that - It wasn't as straightforward as you might think.
I started with a map I created in Google's My Places, and embedded that in my blog. Then found there was no way to put a location-based waypoint on one of these maps using Google Maps for Android. I got a hint to try Google's My Tracks. I had been using that app, but didn't realize it had a function for adding a waypoint, or for uploading it to a My Places map. With minor fiddling, it worked.
The full story, and our map, is on our blog:
http://laughingdawg.blogspot.com/2011/09/posting-waypoints-along-way.html