The truth is Scientology is a scam. There is more than enough information freely available on the Internet now that no one should fall for it again. Sadly though, this has not proven to be the case as some still seem to put stock in the disingenuous work of Hubbard.
A good starting place would be the recent work of the St. Petersburg Times.
The Truth Rundown
A fantastic look behind the scenes of the creation of Scientology and the true life history of L. Ron Hubbard in the book
Messiah or Madman?
The people in Haiti need bone surgeons and real medical doctors not Scientologists playing their silly mind games.