It would be good if Hudson could switch from deprecated ATOM 0.3 to the recent
ATOM 1.0, which is an official IETF RFC in the Standards Track category:

http://www.ietf.org/rfc/rfc4287
http://www.atomenabled.org/developers/syndication/atom-format-spec.php

I can provide a patch for this, if this enchancement is desirable.

Benefits of using ATOM 1.0: It's a more or less standard, feed validator from
http://feedvalidator.org/ can be used to make sure Hudson produces valid feeds.

Currently, it complains about ATOM 0.3:
column 0: This feed uses an obsolete namespace