In my work I sometimes need to schedule meetings with people, all at once, who live around the globe: New York, LA, Sydney, London. As I am math-challenged even on the best days I find the time zone issue confounding and almost always get something wrong. I'd tried a number of time zone converters but none displayed multiple cities in just the way I needed. So I was delighted to find out about World Time Buddy, which displays time by cities all at once. I tweeted about this and was almost immediately, resoundingly, hammered with responses like "this is not useful for webinars" and "I don't need to know the city, I need to know the time zone".
Here's the thing: World Time Buddy is useful to me. It is the tool that solves my problem. It is what I need. With literally dozens of time converters out there, no doubt there is something more useful for you, that solves your problem. This is part of the magic of the web 2.0 world: people can find just-in-time, just-for-me solutions. Some of us think that maybe that's supposed to be the point.
I see this happen, too, in discussions of most other tools. People say, "Well, college students don't use Twitter" as if there is some fatal flaw of Twitter that only college students see. Why would a college student use Twitter? Do most undergraduates need to reach out to big online communities day and night? I like Twitter because I am in a very isolating work role and have found it a wonderful way to connect with other L&D professionals and writers. I didn't really need that when I was in college. (And by the way: when I'm in a location with lots of friends nearby, like at a conference, and want to keep in touch via text, I don't really use Twitter for that. I like the Beluga phone app. I bet college students have something they like for that, too.)
And of course it is happening now with Google+. I keep going in to look at conversations, and I'd guess that fully half of them right now are either arguments about how Google+ is better or worse than some other tool, or discussions of which other tool will or will not be put out of business by Google+. I like Google+ fine, and I've enjoyed playing with it for the past week or so. I also still like Facebook and Twitter just fine, too. Others like LinkedIn. Or Ning groups. Or [name your tool]. (As I've said before: Don't like Facebook, Twitter, or Google+? Ask for your money back.)
I don't know why we feel there has to be one magic tool to rule them all. But I do know this, for sure: If tomorrow someone launched the Perfect Social Media Product, which was free, ridiculously easy to use, seamlessly integrated with every other need and tool, and solved every problem we had, then the day after tomorrow there would rise up a group of People Who Hate The Perfect Social Media Product. There would then be another tool, and more discussions, and ... will it ever end?
So my $.02? Find what you need, and use that tool/those tools. Partly that may be driven by where your best connections spend most of their time. But don't be blind to other, newer things, or places where other good connections are spending time, and try to give them an honest chance. And please, if we ever need to have a meeting in Yokohama, be sure to double-check my math.