I think that the choice, realistically, for the future global language lies between English and Esperanto rather than an untried project.

It's unfortunate, however, that only a few people know that Esperanto has become a living language.

After a short period of 121 years Esperanto is now in the top 100 languages, out of 6,800 worldwide, according to the CIA factbook. It is the 17th most used language in Wikipedia, and in use by Skype, Firefox and Facebook. Native Esperanto speakers,(people who have used the language from birth), include George Soros, World Chess Champion Susan Polgar, Ulrich Brandenberg the new German Ambassador to NATO and Nobel Laureate Daniel Bovet.

Further arguments can be seen at http://uk.youtube.com/watch?v=_YHALnLV9XU Professor Piron was a translator with the United Nations in Geneva.

A glimpse of Esperanto can be seen at http://www.lernu.net