I imported our member list, but for some reason the expire dates were all set to 9/20/2009, which prevented me from doing a rebuild db to move them into WP. Is there a way to delete all users so that I can reimport them correctly?
So you added payments AND users or what was the expiration date that you're referring to? Either way, from PhPmyAdmin you can run a SQL command like: DELETE from members where added = {whatever the added date/time value is for the users you imported} and/or DELETE from payments where expire_date = 2009-20-09 obviously backup before experimenting