Our main developer *cough* me *cough* is a real procrastinator and divulging any significant details at this point would probably kill our chances for success. More importantly this project is interested in original ideas and how YOU want it to be different. There’s plenty of hobby applications that do just about nothing. We want to be more than a map. While an Internet connection won’t be a must for our application it will be required to achieve the best user experience.
Recently we've implemented GPS data caching to disk. Now if there is not an Internet connection or any type of computer failure data will still be available for upload once the application is open and a connection is available. This I've found is available already in a few other similar applications here on the forums (I don't really visit here that often). It’s nothing to boast about.
Of course we are heading towards multi-user support, buddy lists, etc, etc as are also available on other tracking programs. It’s what everyone does next that will set them apart.
Some big hopes to meet would be either some type of integration with existing in car navigation systems, or home grown navigation system / open source navigation system. There is much to accomplish before we go down that road.
Eventually I’d like to see this project go open source, but we need to be established to the point where we will have contributors rather than thieves. Switching to OpenLayers from Google Maps is something we will likely attempt shortly as I feel Google could become (is) a competitor in this area already.