Here's a link with description and suggestions for managing swimmer's ear infections:
http://www.kidshealth.org/parent/infections/ear/swimmer_ear.html
An eclectic page of good swimming related links from Gary Manning's web site:
http://www.accesswave.ca/~unnswim1/bull.htm
An article about shoulder pain and prevention by stroke modification that's easy to understand.
http://www.swimmingcoach.org/articles/asm/asm20010218.asp