John, Sylvain and I have been working at this on and off for over a month now (we've all been swamped with other things—the actual development of the site was fairly straightforward). Planet Atom is built on an aggregation from Atom 1.0 feeds into one larger feed (with entries collated, trimmed etc.) It's built on 4Suite (for XSLT processing), CherryPy (for Web serving), Amara (for Atom feed slicing and dicing), atomixlib (for building the aggregate feed) and dateutil (for date wrangling), with Python and XML as the twin foundations, of course. Thanks to folks on the #atom and #swhack IRC channels for review and feedback.
I heard rumor that this was in the making. Good to see its now live! :)
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