Slacker let me know that they have rolled out a custom Halloween station that you can find on your BlackBerry. This just means that there will inevitably be one for the upcoming holiday season. 🙂
Still the station has some great music with a wide array of artists including: The White Stripes, Black Sabbath, The Devil Makes Three, Nick Cave, Jimi Hendrix, The Horrors, The Avett Brothers and many more.
Though surprisingly they do not specifically mention the Monster Mash… You can check it out from your PC at www.slacker.com/halloween or on your BalckBerry in the Slacker app under the "top stations" or "seasonal" music category.