Wooo! Looks like expansion port connectors are finally being produced. This means that development for all sorts of new products can begin! EtherNES, Sound expansions, etc.... Awesome!
This has some very interesting potential! One of the propositions is getting sound expansion to work without opening the NES or doing any soldering, which is cool. You'd still have to break that plastic tab off the bottom of the NES in the expansion port, but for some it might be easier + more fun to do it that way...