I have gone too long without digging into this but the search function on fspamlist.com now works with wildcard domains.
So, if *@examplespam.com exists in the database and you search for firstname.lastname@example.org , the search will return with the result of *@examplespam.com to let you know that no username at that domain can be trusted.
Edit: Also, MysteryFCM has fixed the export bugs. (which we are trying to move away from away to encourage installing his phpbb2/3 and many more mod that will integrate directly with your forum for up-to-date blocking capabilities)
and for integration into your forums software see: http://www.temerc.com/forums/viewforum.php?f=71