Yes, that goes for the rest. Sprint is nice enough to provide you with the 'launcher' icons to load the programs, too (although I don't use any of them, so I consider all those icons to be bloatware).
Since you have the $30 data plan with Sprint, all your usage for those programs (they all use data) is included in your plan.
Or you could dump all those different icons and spend $30 to buy JiveTalk - an all in one IM application that will allow you to chat with all of those different IM applications in ONE application. Check out Beejive | instant messaging, just about anywhere