Gabriel McGovern, a Web designer in Portland, Ore., who started artofobama.com during the presidential campaign last summer, said he had not intended to continue it past the election but had been receiving such a steady stream of submissions — commercial works, personal works, works photographed on the streets, 300 or so images of paintings and other kinds of art that he has not yet had time to post — that he decided to keep the site going.

“My favorites are the first-time painters,” he said. “It might not even really look like Obama — in fact, not much at all — but they not only paint it, they go out and find a forum on the Web where they can post it so everyone can see it.”