Music From Outerspace is an awesome website! Too much info to blog about, it is just a matter of looking through and picking out whatever you need. Some people think that Sound Lab Mini synth is pretty easy, however the WP-20 found on the MFO pages appears to take the cake on that. Full instructions can be found in the handbook available from MFO link:
http://www.musicfromouterspace.com/analogsynth/WP20/WP20_PG1.html Each synth component whether it be LFO, VCF, or VCO consists of only a handful of components and ICs. However the builds look very impressive when built carefully.

Sound samples from WP-20
http://www.musicfromouterspace.com/analogsynth/soundgallery/WP20.mp3
http://www.notbreathing.com/carrion/mp3/wp20.mp3
Thanks Phil.