phungy, the reason you're catching flak is not because of your advice towards jivetalk, it was because of your statement "Glad I ditched my BlackBerry for an iPhone."
This is a BlackBerry user forum, what kind of response do you expect with that type of talk? The iPhone appeals to an entirely different crowd and I think that few users here would be able to consider an iPhone for multiple reasons that keep them as BlackBerry users. We're all happy that you are pleased with your purchase, but don't expect to start an iPhone fad on these forums.
That being said, I've used google talk since my 7520 and have had it connected to my AIM and MSN accounts through jabber transports and have never had trouble with it. It's a pretty good application for free, and supports all the other IM clients provided you are handy with setting such things up. (Using MirandaIM or other jabber client)