The "title" of each "item" in that .xml looks like "hlint 1.8.10" which can be split on the space to give package name and version. That could flag certain packages we support as having upgrades available. Those of course would want to be checked against something like http://packdeps.haskellers.com/ and/or http://bifunctor.homelinux.net/~roel/hackage/packages/archive/pkg-list.html to make sure the updates won't break things.