Like Matt, I do not mourn the decline of the phone call:
Personally, I couldn't be more thrilled with the phone's decline. I used to be painfully shy as a person, and while I've largely gotten over that IRL I still find it incredibly stressful to talk to people on the phone.
Instead, I email. I SMS. I blog. I Twitter. I write on Facebook wall pages. I use IM and GChat constantly. Anything but the phone. I'm sure I'm not the only one who feels this way, and in the years to come we phone-haters will inherit the earth. I call it progress.
Weird fact: every single (successful) blogger I know hates talking on the phone. I'm gregarious face to face, and I'm an inveterate user of various kinds of textual messaging, but I would rather scrub my floors with a toothbrush than get on the phone. I don't mind doing interviews, but whenever I make or receive any other kind of phone call, even from charming people whom I deeply love, I immediately start wondering about my exit strategy. One blogger I know won't even check his voicemail. I have no idea what this all means, but it must signify something about the kind of personality it takes to blog.