Although it is hosted on WordPress.com, this site is not an actual blog. You can find my thoughts on Dynamics CRM from a blog hosted elsewhere, called Surviving CRM.
Compare customizations between two different CRM organizations: attributes, form sections, tabs, relationships, events, Business Rules.
Log events to file, database, event viewer or CRM entity with this tool, enable/disable logging for each plugin step or custom workflow assembly type.
Microsoft Download Center: http://www.microsoft.com/en-us/download/details.aspx?id=43110
MSDN overview of USD: http://msdn.microsoft.com/en-us/library/dn646899.aspx
Microsoft Download Center: http://www.microsoft.com/en-us/download/details.aspx?id=43109
KB article on CRM 2013 SP1: http://support.microsoft.com/kb/2941390