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If you own ***.amiga.org, then anything before .amiga.org is yours as well ? (Notice the first ".")
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Many newspaper sites use "//www.name.com" as the front door, once your there, clicking on a searching link may send you to "//archive2004.name.com", clicking on a forum link will send you to "//forums.name.com" or what ever other subdomains they may use to organize articles, forums, want ads, ect... transparent to the user, who just looks for the links on the "//www.mainpage.com" that send them to whatever subdomain their interested in.