wsj recommended blog sites:

Commerical real estate info:
http://www.theslatinreport.com/

Macroeconomic stuff:
http://www.rgemonitor.com/blog/roubini

markets etc:

http://bigpicture.typepad.com

for fun: adrants.com

financial disclosures etc.
http://www.footnoted.org/

taxes...
http://taxprof.typepad.com/