Jobs/Internships sources
Colorado Ski Resorts (jobs)  
Game Face
Hospitality Careers (jobs)
NBA Team Jobs (jobs and internships)
NFL Team Employment Opportunities
NHL (jobs and internships)
Online Sports (jobs and internships)
Resort Jobs (jobs)
SportLink- Association of Sport Product Industry (jobs)
The Walt Disney Company (jobs and internships)  

Information sources
NBA  
NFL
NHL
WNBA
US Soccer