The Internet will likely grow beyond 100 million websites this month. In August there were 96,854,877 hostnames according to a survey from Netcraft.
In August the Internet grew by 4.2 million sites and gained 15.5 million since June of this year.
The popularity of Google's and Microsoft's blogging service appear to be the main reasons for the explosive growth of the Internet. Netcraft said that Windows Live Spaces added 1.3 million hostnames over the past month and Google gained about 459,000. Compared to the first five months of this year, when the Internet added an average of 2.75 million new hostnames every month, the average has almost doubled to an average of 5.4 million since June.