Katie Couric's Notebook: Unplug

400 million people are friending, unfriending, and trading Farmville cows on Facebook.

50 million people are tweeting, retweeting, and getting into tweetbates about March Madness or the virtues of Four Square.

To paraphrase William Wordsworth, the World Wide Web is too much with us.

One nonprofit group called Reboot wants to do something about it. They're declaring a National Day of Unplugging, beginning tomorrow at sunset. The idea started as a remembrance of the Jewish sabbath...but as USA Today pointed out...the principles are pretty universal.

Put down that blackberry, connect with loved ones, take a walk outside.

An AOL study found that 59 percent of PDA users check their inboxes every time a message arrives.

You've got mail? More like you've got an addiction.

A video on YouTube called "Yelp" asks people to cut the umbilical chord of data.

It's a sad irony...to learn more about a campaign to disconnect...you have to be logged on.

That's a page from my notebook.

I'm Katie Couric, CBS News.