juice,
all these cards and g3 phones are compatible with mac and pc. you might want to check out phones and cards that are compatible with gsm's system, which is different from edge - i use it and get speeds that are comparable to adsl.
the best card on the market at the mo is the merlin made by novatel but i am not sure that you would find it in los.
[url]http://www.novatelwireless.com/products/merlin/merlin-v620.html[/url]
you might also take a look at the nokia 6680, which uses a usb 2 data cable or the later model, 6682 which i have and also accepts phone calls while hooked up to the internet.this is a g3 phone which works on both fast hook ups. small concilation is that the data cable is included in the package.
if you would like even more sophisticated hook ups then you can pick up a bgan sat phone for the paltry sum of $650.- depending on where you buy it.
the phone is around $450.- in los but the card might be more.
cheers