It is, it seems to me, another travel tax to impose on visitors for the sole purpose of paying for an organisation that sells the USA; there is no evidence that suggests visitors will benefit directly or indirectly in any meaningful manner.Ten dollars entry payment to the U.S.A. is being proposed. The Travel Promotion Act, which is to form a new 'promote the USA' organization (an international tourism sales driver) is going through American legislature right now and is expected to be signed by the President, very soon. http://www.cnn.com/2010/TRAVEL/02/26/travel.promotion.act/index.html?hpt=Mid.
Some emerging economies have an entry levy of a nominal sum, money which has to assist caring for sights of international interest, not for paying for top heavy administration and blatant travel promotion exercises and any other allegedly aligned interests. With enough visitor numbers, this proposed tourist entry levy is a money-spinner. It is not clear, however how this honey pot will controlled and managed.
Perhaps we should all follow suit and extract additional monies for pet government/federal projects from people who visit our shores.