EXS 24 Logic Sampler Users Group

Have any of you listened to the EXS24 demo (stream) on the front of 
emagic's home page?  They have some cool arpeggiations when you 
click on the audio samples for EXS24, but this is not a function of 
the EXS, is it?  They must have loaded a sample into the EXS and 
used Logic's Arpeggiator for the sound?  I've never used Logic's 
Arpeggiator before, but where do you actually insert it in order to 
get an instrument to arpeggiate? Somewhere in the environemnt 
window?  Thanks!

See ya,
Mark