Cell Motility and Shape: Microfilaments - A brief, yet good summary of cell motility and shape. Contains good references for further information.
Cytoskeleton, Cell Motility & Motors - BioChemWeb - Excellent site containing anything you would ever want to know about everything cellular. Highly recommended.
Cytoskeleton Research Homepage
Wikipedia: Flagellum - Good site for general information regarding the flagellum.
Molecular Machines - Great site for illustrations and animations regarding cellular motility.
More Bacterial Flagellar Information - A great site about the motility of E.Coli
Sex, Wild-Style - an interesting article about animal sexual selection
Eyelashes Up Close - An article about cilia's role in disease
Sperm Sparring Spotted - An article about competition between sperm of different males
Sperm Motility Secrets Revealed -
Wikipedia entry on Don W. Fawcett - A noteable sperm researcher and founder of the American Society for Cell Biology(ASCB).
A Downside to Female Promiscuity
Along Came a Sadistic Spider - an article about traumatic insemination in spiders
Airway cilia taste toxins - an article about cilia in the airway that can detect toxic substances
Robocilia at work - an article about manmade cilia
What is Sperm Morphology? or More about sperm morphology plus some related information about infertility
Catch the Sperm - Use a condom gun to catch the sperm and diseases before they pass.