funky Atomiswave pcb (non-cart version of Rumblefish).
I got this in the post today. I refrained from posting any info on this until it was in my hands.
these are not my pictures but those taken by the person who sent it to me (he didn't know what it was but thought it was a boot).
I will take pictures of it myself just that my camera skills are shit (I took some they came out fuzzy).
as you can see, the bit that fits into the AW is extractable. the underside has rubber/thick foam 'cover'
I tried it out - works perfectly. this is the only copy of Rumble Fish I have and have only played it at the arcades a couple of times so I can't say if it's at all different (probably final release build but I can't be sure).
cool little thing. but what is it?
edit: here's a picture that came out alright to show how the 'top bit' fits onto the 'bottom bit':