Ask not what CPAN can do for you, ask what you can do for CPAN. CPAN day falls on the 16th of August. What is CPAN day? The anniversary of the first "true" module upload to CPAN, on the 16th August 1995, and a call to arms for bug fixes, releases and other contributions.
A nice idea, considering that (at time of writing) there are 501 pages of issues on RT (yes, I appreciate many of these are very old or for modules which no longer exist).
See also The ghost of CPAN days past.
Update: that should have said 501 pages of issues.
Update 2: /paves/pages/.