yeah, the 8 bit thing is getting sort of old, but wuddevva. Gay Against You posted this in a bulletin on myspace:-
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we don't use any of these,
we didn't make any of them
they are available free at these links though:

http://www.ymck.net/english/download/index.html = YMCK magical 8 bit plugin
http://www.refx.net/?page=quadraSID = reFX's quadrasid
http://www.tweakbench.com/peach = tweakbench "peach" nes synth plugin
http://www.tweakbench.com/toad = tweakbench "toad" nes drums plugin
http://www.davidfarler.com/software/nesvst10.zip = nes vst synth
http://www.jackdark.net/SYNTENDO.ZIP = syntendo vst synth
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Syntendo is a big complicated synth with lots of knobs thats very fun for making noise, peach is quite nice off the peg cute nintendo synths, toad is a drum kit made out of typical nintendo sounds and mario sound effects
others are vaguely useful, and only small, so get them anyway