I don't think I've updated my blogroll for at least a year... shame on me.
This update is mostly additions. I only removed Max Dama's blog, and that was only because it no longer exists. I left Skill Analytics because it contains excellent information, even though Damian hasn't posted in a long time.
The additions are:
The Physics of Finance
Algorithm Zoo (by Milktrader)
SEF-Blog: Signal Extraction and Forecasting
1 day ago