The last remaining volume of the Selected Letters of Philip K. Dick, some 20 years in the making, is possibly going to be released. The letters cover the years 1980-1982. Henri Wintz, who runs the PKD Bookshelf, made the announcement. Wintz was involved in typing the letters up when they were selected in 1989.
Amazon is listing a December 28, 2008 publication date and the book costs $30.12 with discount (considering that the out of print earlier volumes go for $100 or more this is a good price).