I've just found a great way of sending my location to friends/family etc.    i.e know that situation when your stuck stationary in traffic having a conversation (handsfree of course) about how you haven't moved in 45 minutes.     With a GPS connected Windows Mobile device its easy to email your location by sending an email containing a link with a url formed like -

http://maps.live.com/default.aspx?v=2&cp=52.262573~0.19683&style=r&lvl=14&tilt=-90&dir=0&alt=-1000

Note the long/lat co-ordinate embedded in the URL.

It works great.   Happy to share the source of my app that sends the mail if anyone is interested.