SInce corporations started noticing the marketing and sales potential of the Internet, things have changed a little about domain name registration. If the domain name you register infringes upon the trademarked name of a product, title or name of a famous individual or commercial entity, you can be sued successfully. There is now precedent, and gone are the days when you can create a domain name like pepsi-soda.com hoping to get a huge check from Pepsico since they can just force you to desist in its use.
America.com, btw, appears to be a sketchy portal site at this time with no information on who runs it.