i bought the Platinum 50 2 days ago.
Only negative point at the moment is - during a charge of the akku the display does not react correctly.
I activated the developmentoption to see the interaction with the touchscreen and it shows multiple touches when the akku is on charge.
But all in all i love my new archos platinum!!
Tested apps :
3G watchdog (documentates the connectivity of the mobile internet and wifi)
Minon Rush (3D game)
All of those Apps are working without delay and errors!
and all in all i configured my google calendar to put all birthdays from facebook in it.
The akku works very good. I needed to charge after 1 1/2h usage (wifi/mobile internet)
Sorry for my bad english - i am from germany
Any questions?! Ask!!