Every week new virtual compilations turn up on iTunes; the release date is often older than the moment the compilation turns up.
Elvis Presley "Portrait" is a 25 track compilation released by the Musical Memories label on March 31, 2008.
"The Essential Elvis Presley" was released on January 1, 2008 on the Lightsource label.
"Legends The Greatest Hits" is a 10 track compilation released June 1, 2008 on the Lightsource label.
"The Original Recordings" is a 31 track compilation from the Mbop label which was released on November 18, 2008.
"Blue Christmas" is an eight track compilation released through the Rootbag label on November 30, 2008.