Colorado Kid was released mid 2005 as part of a paperback Hard Case Crime's 2nd year series ... King was one the writers involved.
Link
http://www.stephenking.com/colorado_kid_press_release/
Found a copy at a local bookshop and bought it for a lark coz it was cheap (its pretty thin, <200pgs) and a pretty quick read. Its in a similar vein as Buick 8, as it involves a bizzare mystery, but to say anything more would be to spoil it.
But i gotta warn u tho, u'll either love it / hate it. There's no middle ground here ... even King says so at the end of it.
The Cell is only out on hardcover here, no paperback yet. And Lisey's Story is only out in October.