Haha .. didn't know about that one but I still think it's obvious that they're involved in the Gateway hack ... I mean, why post pictures and progress of all your research and when you succeed, you just say: We'll never release it to the public and the only news we had after, was that firmware 5.x.x fixed the exploit they were using. Do you really think they did all that work just to say: well, Nintendo patched it, it was fun but let's call it a day. It would actually reassure me if they are behind Gateway ... that would mean an update for the latest firmware might be possible.
Outside console hacking the is a large culture of making proof of concepts/demonstrations and not working it up to weaponised/so any idiot to can follow a guide level.
Within console hacking there is also a long history (well post playstation definitely, earlier stuff gets odd) of making a proof of concepts/demonstration and leaving others to work it up as well (a lot of the wii stuff (drivechips upwards), quite a bit of the DS stuff, the 360 saw this several times, the original xbox had some interesting things happen, the gamecube I believe had some interesting stuff happen there).
It might not be the case here but it is far from unheard of. Similarly http://marcansoft.com/blog/2011/01/safe-hacking/ wants to be linked about this point.