About 160 million people use Twitter, which may explain the signal to noise ratio.

Ever feel like you’re talking to a brick wall on Twitter? That might be because 71 percent of tweets get absolutely no response from the world.

Toronto-based

At the Windows Phone 7 event in New York Monday, Microsoft and AT&T had demo units of the three WP7 phones that will be available in the United States next month. I had a few minutes to play with each of them. Here are my first impressions.

LG Quantum