Eh, I admit using Microsoft's MSN too. Regretfully, it's _the_ chat application that everybody uses in Holland .
I also have MS Office 2008 for compatibility. I prefer to use the Mac apps like Numbers,Pages and especially Keynote but I've got office as a fail-safe backup. I must say that the Mac version of Office is much more friendly for old-time Office users than the Windows (2007) version. All the menu's are the same old trusty structure, so you're not looking for ages everywhere to see where they hid all the options.