Great review on NPR of Ibrahim Ferrer's posthumous album Mi Sueño. Though there is some background on Ferrer in Wikipedia, it's quite weak. I recommend just buying this album and his work more generally: both are available on iTunes.
One iTunes nitpick: what is the deal with categorizing this music as "tropical"? This is some of the most seductive balladry available, combining elements of afro-caribbean, jazz, cuban, and just sweet melodies. I can't think of a better or more classy backdrop to a evening out -- or at home.