I've just been for a pleasant afternoon drive down to the coast with Lynn, KJ4ERJ, developer of the APRSISCE software, currently on holiday in Spain. No, I didn't nip down on EasyJet for the day. Actually I was following him on APRS using the Google Street View feature in the beta version of aprs.fi.
With the new software, when you click on a station you get the option to Track in Street View. If you do then the browser window splits in two, with the top half showing the view the person you are tracking sees, facing the direction he is going, and the bottom half showing the track on the map. It works pretty well. You just have to remind yourself that you are viewing images previously taken by Google, not live images!
This is beta software, so you won't find it on the regular aprs.fi just yet. But it's a pretty cool application, I think you'll agree!