Bands United - Open to students in marching and concert bands, Colorguard, dance team, jazz ensemble and orchestra. [Yahoo! Groups]
Marching Band Planet - Online community providing discussion forums, news, calendar, and articles.
Marchingband.net - Portal with music theory tests, photographs, forums, and guestbook.
Marching.com - A source covering high school events, competitions and scores. Includes links to resources by topic and bands organized by state and country.