You'll be hearing all about Alli everywhere soon. This diet pill is going to be advertised heavily this year. Over 150 million dollars will be spent in just one year to promote this drug. That would buy quite a few celebrity endorsements. It's the first diet pill drug to be approved for sale over the counter, without needing a prescription. See the New York Times article about the Alli advertising promotion by GlaxoSmithKline.
Alli works by preventing the body from absorbing some of the fat one eats. This could have some very uncomfortable side effects if one eats too many fats.
