http://www.transycan.net/blogtest/2007/04/25/two-plugins-for-wordpress-21-in-series-and-cqs/
I have updated two older plugins:
In Series by Scott Merrill (Skippy)
and
Custom Query String by Matt Read
to work with WP 2.1.x.
Enjoy!
p.s. I am afraid I posted in the wrong forum, sorry.