I recently came across SciFiGuy's blog, which is an interesting read covering various strands of spec fic. Plus kudos to him for coming up with a great blog name.
Also, my (actual, real-life) friend Liz has literally just set up her blog Redshift for reviewing books and other items of interest. With a reading speed that puts me to shame, she's already posted four book reviews in as many days. I now feel wholly inadequate. However, that does increase the number of Colchester-based SF&F blogs by 100% that I know of :-)