When I'm looking for an orphaned blog, I have to say that for every orphaned one I find, there are 10 to 100 that are alive and running.
Searching in the sci-fi genre there are piles and piles of geeks still going strong with blogs.
Some of the orphaned blogs you find out there are really put together and it's clear someone spent a lot of time on them, but then let them go unused for over 2 years.
Orphaned blog: Astrona - Space & Astronomical Art Journal
Post history: 69 total posts, from 9/2006 to 9/2008.