Just a warning:
Setting up a webpage with a redirect message is not advised by Google.
If you do so instead of setting a redirection via .htaccess, or a permanent link, then this will be regarded as link spam and the ASDF manual page will get lower in the search results.
Note that it is not too difficult, and probably advisable, to add a sentence at the beginning of the manual saying something like: "You can find the latest version of this manual at http://common-lisp.net/project/asdf/asdf.html"
Juanjo
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Instituto de Física Fundamental, CSIC
c/ Serrano, 113b, Madrid 28006 (Spain)
http://tream.dreamhosters.com