Here are a some web resources designed to help you locate an internship opportunity. There are many more.
Intern Help Me
InternHelpMe.com is managed by the Maine State Chamber of Commerce, and connects college students with employers in Maine.
CareerRookie.com is an internship site with a highly developed search engine.
USAJobs.gov offers internships by the federal government across all fields and majors. A great place to start exploring federal internships is by searching under the categories of Student Career Experience, Student Temporary Employment and Summer.
Internships.com is devoted solely to internships and provides excellent services and resources. Interships.com maintains the largest database of internship opportunities in the world.
USAIntern.com has a listing for Maine opportunities.
Get That Gig
getthatgig.com is another site with a comprehensive listing.