okay all, i'm in the market for a new phone. or at least some device that will let me make phone calls as well as other stuff. i've been a regular mobile phone user, but now i'm looking for something with a bit more... now one of the things i'd like to be able to do is use a PC app on this mobile device. (i've heard from a friend that they have a PDA or soemthing that does this, i must still find out what exactly he's got... but only a device running Windows Mobile will do this, right?) it would also be a bonus to be able to view PDF's, if not being able to run PC apps. I believe a phone like the Sony Ericsson M600i does this. i also don't want somethign that's too big, or necessarily with a full QWERTY keyboard. i did happen accross the Samsung SGH-X820, which is the worlds thinnest phone, but i don't know if its in Australia yet? well i'm kinda seeking guidance on the whole smartphone/PDA/XDA thing (what's the difference between a PDA & XDA??) are there any other features that i should be aware of, that i would want down the track, and also which phones/brands would you go with, from an ease of use & features point of view? i also posted it here, because it's not really Apple-related, so not really a section for it... and this is of course just to hold me over until iPhone makes it to Aus.