Wow! I made it out of an "account/which sign-in and password DID I use?" black hole. Need I say more vis a vis a comment on technology???
Well, I will. It's this. Don't make assumptions about how people ACTUALLY communicate. Most folks have a phone # (or 2 or 3 or more), an email account (or 2 or 3 or more), perhaps a blog (or 2 or 3 or more) and EVEN an actually physical address to which you can MAIL a letter (imagine that)
So, which technology to use for any given person you want to communicate with can be a crap shoot. For example, I have a cell phone which I rarely have on unless I need to call my son, or, I'm on the road and am expecting a call. If you call and leave a message I probably won't get it until my techno son notices and says "Hey, Mom, you've got messages" He, of course, at 15, will use any feature there is to use on his cell phone, which was purchased by yours truly SOLELY so that he can check in with me and I can track him down when he hasn't checked in.
Then there are those you ONLY use their cell phone (yes, ditched a home land phone)
Then there's email. The best thing since Silly Putty. Yet, I have found that there are folks out in the business world who don't use their email. They give it to you, it's on there business card and everything else associated with their job, but be dam*ed if they really use it. They are the phone people. They will play phone tag with you for days on end but never respond to an email. I find this very frustrating. But, what are ya gonna do? That's right - give 'em a call.
In sum, technology has to be used to be of value. We need a technology that keeps track of how each of the thousand people you know uses it. Any takers?