I just set up Planet Catalyst at http://planet.catalystframework.org to aggregate blogs about the Catalyst MVC framework. It is also linked from the main Catalyst homepage and Planet Perl so you can reach it from there. The planet is focused on articles related to Catalyst and friends which means it filters articles on catalyst, dbic, dbix(::|-)?class or html(::|-)?widget, h::w or handel (case insensitive). Let me know if there are any other topics of interest that should be included.
Planet Catalyst is powered by Plagger, a Perl-based RSS/Atom feed aggregator. Thanks to Tatsuhiko Miyagawa for writing Plagger and answering my questions on the #plagger FreeNode IRC channel. It was very easy to add filtering on keywords by specifying a rule in the config file.
If you have questions or would like a blog added, send email to the catalyst-dev mailing list, comment on this article or ask on #catalyst / #catalyst-dev perl.org IRC channels.