Does instant messaging use a lot of data? For example if I got an iphone 4 or 3gs on a 500 mb allotted data plan, would I be able to use IM like the windows live app without worrying about going over my limit? All i'd really be using data for is msn so?
Also if anyone knows any good plans in Canada that include good rates for instant messaging can you let me know? It seems all the unlimited instant messaging plans are for blackberries x.x

