I am not sure what methodology the Observer line up uses to establish the ‘powerfulness’ of a blog but perhaps I shouldn’t scratch it given that Samizdata.net ranks 39 on their list of the world’s 50 most powerful blogs.
But I will given that our ‘blogfather’, Glenn Reynolds is missing from the list. And probably a lot of other blogs that I’d consider more influential.
To me it has always been about who reads your blog (and shares your ideas further), not how many that makes a difference. Of course, having an audience to start with helps. 
david cushman
on Mar 10th, 2008
@ 17:18 pm:
I have similar thoughts – a preference for being famous for 15 people rather than 15 minutes, if you will.
Blogged my bit here:
http://fasterfuture.blogspot.com/2008/03/50-most-powerful-ways-to-provoke.html
Jackie Danicki » The "world's 50 most powerful blogs"
on Mar 10th, 2008
@ 19:06 pm:
[...] join Adriana – one of the editors of that “powerful” blog – in questioning the methodology used to [...]