Wow I only just found this thread. The software looks great! For name, I reckon ALDLDroid is a good name, because you know what protocol and you know what platform. Hard to forget.
As for tuning, you can do that via aldl with an nvram mod, eg on the '165 you can run this after replacing the memcal with an nvram chip and hooking up the write pin to the cpu:
http://pcmhacking.net/forums/viewtopic.php?f=27&t=356
I wrote the plugin for tunerpro to support it
http://pcmhacking.net/forums/viewtopic.php?f=3&t=590 essentially it talks to the chip emulation layer in tunerpro and the logging layer, and holds up the logging side while inserting read and write requests on the emulation side. Ironically, in this case emulation has been moved back to to the real and physical storage in the ecu.
I have this system in my car and an sgs4 phone, and would love to test the logging side.
As for purpose of using a tablet? I'd love to install a cheap 7" tablet in the car and use it as a full time monitor. That'd be way cool.