"Slides and levers" would have been an Arp, not a Moog. And the analog sound and knobology have made a comeback; my Yamaha CSX-1 has a set of six knobs that can be used during performance; some of their fuctions are assigned with a digital synthesys matrix though.
http://voicenet.com/~maggie/mslmusic.htm
I want one of these though:
http://www.korg.com/gear/info.asp?A_PROD_NO=KARMA
There's a *boatload* of historical Moog information, data and images in the Wendy Carlos "Switched on Boxed Set".