The idea of Tracker looks very promising, but there are some things I'd like to see as well (the number dialing thing is one I had not encountered yet, but I too would certainly desire that functionality!).
I'd like something which could truly replace the standby screen. I would want such an app to display the network operator's name, and the day and date as well as the time. That is one thing which has bugged me on the E61, having the profile name overwrite the day and date for any profile other than General. It would also be nice to see the profile name as well, even if it is General.
Oh, and at least for the QWERTY E61, it would be nice to have some app (Tracker looks like the perfect candidate) make it possible to dial numbers which are specified alphabetically or alphanumerically (like 1-800-SYMBIAN, for lack of a better example) without mental gymnastics, as the embedded numeric keys lack the ABC, DEF, etc. labels.
As Tracker is obviously a power user app, it would be very cool if it could display selected technical info (MCC/MNC, cell ID, signal strength in dBm, etc.), such as that accessible with PhoNetInfo, on the active standby screen replacement. Also allowing display of a selected number of text messages and/or emails, as well as open programs, memory and storage stats, etc., all in a very small font on the same screen, would be excellent.
Additionally, I could not find a way to have Tracker display a background picture, such as I always use on the active standby screen. This would be most welcome. Even better would be if it were able to extend to the entire screen, without a border from the current theme as is present on the stock standby screen. Allowing fonts and colors to be changed independently of the current theme, i.e. to make the display more readable on top of the chosen background picture, would make it even better.
All in all, a very cool app, but I'm not sure that it does enough at this point for me to purchase it. If it gets the above suggested additions, it could be a killer app. And FWIW, I have bought several other programs from SmartphoneWare which really have added to my device.