bigfoot: you (probably, prove me wrong people!) won't be able to do it straight from phone to routegadget, but you can do it very easily with other things. I use a thing called runkeeper (google it or app store it) which you can upload tracks to (i.e. you click start, do your activity, click stop and then it uploads it) and then you can log in to the site and download the gpx file which you can then upload to routegadget.
A quick google gave
this which may be better