If you want some good Marijuana songs, check out Mystic Roots Band... it's a little band from Cali and they have the best weed songs i've ever heard. I have a playlist on my ipod with all smoking songs.. here's some that haven't been mentioned yet.

"Smoke a Pound" - Mystic Roots Band
"Smoke Out" - Mystic Roots Band
"Sweet Sinsemilla" - Mystic Roots Band
"Pass the Marijuana"- Mystic Roots Band
"It's Sickening" - Classified
"Stone Love" - Pepper
"Welcome to Jamrock" - Damian Jr. Gong Marley (the first few lines are about ganj... and its a great song!)
"Get Ready" - Sublime
"Officer" - Slightly Stoopid
"Fat Spliffs" - Slightly Stoopid
"This Joint" - Slightly Stoopid
"Higher Then High" - Steel Pulse
"Hempilation" - Long Beach Dub All Stars

And the best weed song made yet... "BURN ONE DOWN!!" - Ben Harper