'Round my area people roll tobbacco/weed joints all the time, in fact its so common that they've even got a slang name for 'em, Mookies. I personally like to mix a little rolling tobbacco into my joints, not much maybe like a 75/25 weed to tobbacco mixture. You gotta be careful though because like others have said if you get too much tobbacco in there and your not a regular cig smoker it'll make you sicker then hell.