Twitter Popularity Soars - Up 131%

The micro-blogging service run by Twitter Inc. more than doubled its number of U.S. users in March.

The San Francisco company signed up more than 5 million new users across the country to hit 9.3 million last month, comScore said in a report released on Wednesday.

The report theorized that Twitter is benefiting from a growing number of mentions in the media. It also reported a large overlap in audiences for major news outlets and Twitter. ... (more)

MARKETING TIP: If you're not on Twitter, you need to be. That's where a lot of your current and potential visitors and customers are.