Tim Bray reports that, by Dave Sifry's numbers,
the number of known blogs, now somewhere around 25 million, has been doubling every 5½ months. Which calls for a quickie Perl script... aha: At this rate, in August 2009, the number of known blogs will more or less equal the population of the world.
And he links to wikipedia saying that the world population was recently 6.5 billion and will be about 6.8 billion in 2010. Okay, but why a Perl script? I'd rather just say
and therefore we want to ask Googleblogs(now)=25E6 WorldPop=6.5E9 b(m)=blogs(now+m)=blogs(now)*2^(m/5.5) ln(b(m)) = ln(25E6)+(m/5.5)*ln(2) ( ln(6.5E9)-ln(25E6) )* 5.5/ln(2) = m