I don't like the term "blogosphere." Sure, the sphere's a great shape, but why are blogs supposedly arranged in this spherical format? Is it a solid sphere, or a shell? Are all blogs really equidistant from some blog central point?
Honestly, it sounds like a layer of the atmosphere. Right between the stratosphere and the mesosphere is the blogosphere, cold and thin and such.
I propose that we stop taking this "blogosphere" term for granted. Why not another shape? Where are the blog cones? The blogular prisms? The blogular pyramids?
I hereby propose the blogohedron, a regular blog-sided figure with a blog at each vertex.
Long live the blogohedron!