"keep in touch"

Two things happened today which got me thinking about "keeping in touch"

1. A co-worker left our firm, saying "Keep in touch." I added her to my Facebook friends, discovering a bevy of mutual friends already in her list (I'm the latecomer). Once that is triggered, I'll see her posts, her friends' posts. But I also ran across (saw friends of friends) people with whom I wished I were still in touch, and wondered how, if, should I keep in touch. I'm not offering the answer, but if you didn't want to be in touch, it's hard to not.
2. Lorelei Armstrong posted something about writing on her blog, and I felt inclined to answer. As I fired up the comment box, it occurred to me... "Of all of the ways that I'm 'in touch' with her, which is the best way to answer?" Meaning, do I reply directly to the blog? Do I post a comment on her FBWall? Do I send her a direct message? Tweet a snarky remark? Or good ole email?

I found myself thinking about how the rest of the readers would receive my remarks. "How do I reply such that this reply is received by the people whom I..." Ok, stop right there. When we start to target our replies based on friends of whom the recipient is 'mutual', then perhaps 'touch' is that in which we no longer are.

The two questions I would leave here are:

• Are we a few clicks closer to the Singularity, the Overmind, the Collective where we can all sense each other? I would have said 'no' a while back, but now, I'm not so sure.
• With all of these ways to stay in touch... are we?