Can I produce any membership reports?
CiviMember Reporting - Working Example outlines a solution for implementing a variety of Membership Reports using DBQ an open source extension for Joomla developed by Green Mountain Technologies. While the component used is specific to Joomla the SQL behind the reports relates to the data structures of CiviCRM v1.5 and can be used with other SQL based reporting tools.
CiviCRM also includes a number of sample membership reports which use the BIRT Reporting Engine - and can be adapted for your specific needs. Check out the CiviReport section for more information.