Here are some links to effect building sites (and cigar box guitar building sites) that we hold in high esteem:

http://acapella.harmony-central.com/forums/forumdisplay.php?f=94

 http://www.muzique.com/

http://www.geofex.com/

http://www.geocities.com/cigarboxguitar/

http://launch.groups.yahoo.com/group/cigarboxguitars/

http://www.j.philpott.com/effectronics/

www.bellyjellymusic.com