I was doing a little research into logos that smile.
Amazon, designed by Turner Duckworth, 2000
Argos, designed by The Brand Union, 2010
Cider by Kronleins, designed by Amore
Dusseldorf, designed by BBDO
Kraft Foods (previous)
Osaka Welfare Pension Hospital Breast Team, designed by Shinnoske Design
Peel District School Board, designed by Hambly & Woolley, 2005
PeoplePC, designed by Landor
SMILE Organization, designed by Altaf Sharif
I can’t think of any others, except for the one smile that rules them all.