Skype continues is rapid growth as evidenced by its recent Alexa ranking. This week the company is ranked 134 out of all sites in the world. Their three month average is 283. According to Alexa the site was the #2 Mover and Shaker recently with a ranking increase of 66%. For what it's worth the Major League Baseball site was the #1 loser falling 38% from 281 to 470. Still 470 is an amazing Alexa rank is it means this site is in the top 470 sites in the world.
Here are some other VoIP service provider sites and their current 3-month ranks: