Some of the CRM Blogs:

Ronald Lemmen - http://ronaldlemmen.blogspot.com/
Philip Richardson - http://blog.philiprichardson.org/
Gonzalo Ruiz - http://gonzaloruizcrm.blogspot.com/
Ross Lotharius - http://www.avanadeblog.com/xrm/
CRM Team Blog - http://blogs.msdn.com/crm/default.aspx
Andy Bybee - http://bybeeworld.spaces.live.com/
Ben Riga - http://blogs.msdn.com/benriga/default.aspx
Ben Vollmer - http://blogs.msdn.com/midatlanticcrm/default.aspx
Menno te Koppele - http://blogs.msdn.com/mscrmfreak/
Simon Hutson - http://blogs.msdn.com/ukcrm/default.aspx
Aaron Elder - http://www.avanadeblog.com/xrm/
Frank Lee - http://microsoft-crm.spaces.live.com/
Guy Riddle - http://guyriddle.spaces.live.com/
Matt Witteman - http://icu-mscrm.blogspot.com/
Michael Höhne - http://www.stunnware.com
Mitch Milam - http://blogs.infinite-x.net/
Scott Colson - http://msmvps.com/blogs/crm/default.aspx