actually your right,

the majority of the sounds from the 909 are samples, but the snare and kick are all analogue circuitry.....this is why i think everything else can be pretty much sampled, with the exception of the Kick. (but then again, not to flame another analogue vs. samples debate, after a shed load of distortion/compression/EQ, who can tell the difference between the original 909 drum kick to a sample loaded into Kontakt anyways? Its not like someone is gonna run up to you at the DJ booth and say "hey man, this track has a sampled drum kick, it aint the real 909")