I have uploaded a number of small packages to Hackage that I no longer actively use so that I don't find out immediately when a new version of GHC has broken them.  Since Hackage is going to the trouble of finding out when a package no longer builds anyway, could it have a feature where when a working package breaks with a new version of GHC the author is automatically e-mailed?  This would make me (and probably others) a lot more likely to notice and proactively fix broken packages.  (Heck, I wouldn't even necessarily mind being nagged about it from time to time.  :-) )