Some other Halloween songs for spinning:
"Ghostbusters theme" - techno mix
"Spiders and Snakes" - don't remember who sings it
"Time Warp" - Rocky Mountain Horror Show
"Spiders and Snakes" - a fun song, also don't know the artist
"Dead Man's Party" - a good, long climb - The class really like this one.

Venus,
I agree with you about Blue Man group and Santana and Safri Duo. Also Darude has some fast-paced stuff out there, good for sprints. Nightwish has some songs that work well for climbs, most people haven't heard them before so its not just same old, same old. I also like Transiberian Orchestra. (sp?) By the way, where are you in WI? I'm in Iowa, on the border with Wisconsin, so we are neighbors, maybe.

"Sky" - Sonique, good for sprints
"Objection" - Shakira, sprints
"Mrs. Potter's Lullaby" - Counting Crows, climb, over 7 minutes
"Korperbewegung" - Schiller, climb
"The Final Countdown" - Europe, climb
"We won't Get Fooled Again" - The Who, long version for a climb
"La Isla Bonita" - Madonna, warm-up
"Mandinka" Sinead O'Connor, warm-up
"Hero" - Bonnie Tyler, interval
"Tangerine" - Led Zepplin, cool-down
"Ride the Wind" Poison ( I think) , hill
"Annie Waits" - Ben Folds Five, flat road
"No Leaf Clover" - Metallica w/ London Symphony Orchestra, climb
"Disease: - Matchbox 20, another climb ( I like climbs!)
"Smile" - Vitamin C, warm-up

There's so much music out there. I had no idea until I started looking. it's a whole new world to enjoy. I think the music is such an important part of spinning. You can't please everyone but you need to like your own music and pass that enthusiasm on to the class.