check out the article "where there's smoke, there's flavor" in the "meat" section of the library. Everything you ever wanted to know about wood chemistry... phenols, lingin, carbonyls and hemicellulose.
e.g., I never knew (nor thought I cared until now) that high amounts of lingin contributes high amounts of flavor in some woods (ala mesquite), while others have more mild amounts of lingin and more cellulose and hemicellulose which contribute to the color (oak and hickory). Who knew?
Article goes down from there... talking about how to do it commercially, including liquid smoke and other stuff... but very interesting.
Good site, Morgan. Thanks for sending.