not all bt cards will work, only those that has a ce.net driver.
(not wm2003
) for example socket bluetooth. i'm not sure if others will work as the PHH uses a sdio now technology, or whatever
and.. well, there are several other pda's that have 4" and 640x480.
two pocketpcs, toshiba e800/805, and hp hx4700, but they're pocketpcs and the OS doesn't use that resolution by default
(so hacking is needed
).
and another pda-phone that has hpc OS
(actually wince 3.0 but it is fully compatible with hpc2000
), so it is 640x480 by default, but that's very rare in europe