I have an App on my phone which will get my position and do a html get or post with that data every 5 minutes. example [url removed, login to view]
What's required is to write the server side code (I'm thinking PHP or JS) to capture those HTML Gets and extract the lat/log then write that to a file/DB - any format is fine, either CSV, XML or JSON etc - whatever makes most sense.
Then, with the data file obtained above plot that to a html page with a google map inline and a breadcrumb trial on it. e.g. this page's map [url removed, login to view]
pretty simple for a coder but would take me a while hacking things together!