Well, I am not sure can it be called mount. Here is photo of my gear:
http://routegadget.awardspace.com/misc/gearphoto.j...
Phone is taped on the strap of my petzl tikka plus headlamp. Note, phone is between the strap and head, I believe it bounces less this way. There is also a piece velcro to make it stay in place on my cap (it is winter, today -12 C). I haven't done anything to aim it, I guess my skull shape is about right ;) .
There is also my gps logger, I replaced the original big bulgy battery, saved half of the weight 80g -> 40g.. Also vecro there, I keep it it under my cap. And pocket sized N810 linux tablet, I have a little script there, it uses gpsbabel to download data from gps device over BT and sends workout to AP over 3G or wifi. I think it could read garmins too, but I would need usb adapter to do it.