I hereby present the coveted MavPhil Blogger Slacker Award to Harriet Baber of The Enlightenment Project. So far this year, she has uploaded a grand total of two posts. In 2011 she managed to scribble only eleven. That averages to less than one a month. It's a pity: her cantankerous and idiosyncratic entries make for enjoyable reading.
Other good blogs infrequently updated: Jim Ryan's Philosoblog and Franklin Mason's The Philosophical Midwife.