I haven't seen this arrangement before! The most I've seen is as triple planet system, but I've never seen a double-double planet! (they're not particularly close to eachother unfortunately - one pair has a 47 day orbital period and the other hasa 40 day orbital period. Looks like the orbital period of each binary around the barycentre must be about 100-200 days?). Is this worth submitting to the Galactic Mapping Project? (oh yeah - there's also a ringed waterworld in the system too!).