Probably I haven’t mentioned before, but after my Qtek S200 crashed a few months ago, I’ve bought an HTC Diamond. At first it was a little slow and battery consuming, but 3 days after I bought it, HTC released a new ROM for TMN customers which solved those issues. Great timing I had. 
Yesterday I tried a new version of a tool I didn’t know about. It is called GPS Cycle and it uses your built-in GPS receiver to track your position and draw a graph.
But the feature that I really like, is the ability to save your path into a file which can be read by applications such as Google Earth. This way you can review your tracking, if you go for a walk by foot or bicycle , or something like that.
If you enable the geo-referenced photographs in your phone, you can decorate your path with those pictures (with some additional work).
GPS Cycle is available at the XDA Developers Forum. You can enable the geo-referencing in your photos in HTC Diamond using Diamond Tweak. (Other devices that have builtin GPS have similar tools that change some register keys).
