More information can be found on its project page.
The most up-to-date view on the state of all things ASDF-installable (i.e., which libraries work on which Lisps) is at http://common-lisp.net/project/cl-containers/asdf-status/website/output/ (but note with disappointment that it's many months out of date).
If you'd like to help, take at look at ASDF-Install-tester organization. There are also page on ASDF-Install-Tester How-to and ASDF-Install-Tester Bugs.
This test framework is another one of Gary King's projects.
This page is linked from: ASDF-Install FAQ ASDF-Install-Tester Bugs ASDF-Install-Tester How-to ASDF-Install-Tester Organization asdf-install-tester-packages-list ASDF-Status Gary King
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