I ordered this Switchblade Key from EC and while it has no additional utility whatsoever (in fact you lose access to one of your remote buttons) it is very high on the "cool factor" scale. I really like it.
I just received one of these for my recent birthday but haven't had the key cut yet. It does not use the original key.
The unit comes with a key blank and you can purchase additional key blanks if needed. The link has been provided by the OP.
It looks like the same one I have. Nice idea but I am not impressed with the quality. Anyway that's an opinion and everyone has one of those.
An important note though...if it's the same one...is that the electronics for the remote fob (buttons) function does not come with it. You need to either take the electronics from the original factory fob and reinstall in this switchblade, or buy another fob somewhere to take the ledge nice from. I bought a used Honda car fob, which uses the same internal electronics, rather than cannibalize the original gl1800 fob.