The small group of dedicated volunteers who make up the Berkeley Historical Plaque Project has passed two big milestones: They have placed 100 of their handsome green-and-cream plaques around the city, enriching experience in city with the added dimension of time. And they have launched a web site that invites your ideas on people, places, and events that deserve a “virtual” online plaque. Ideas so far range from Don Donohue, who launched the underground comics movement with publication of R. Crumb’s Zap #1 from the Dakin Warehouse on Adeline St., to the now-closed Buttercup Bakery on College, where finance guru Suze Ormann started her career — as a waitress. Take a look at send in your ideas!