Before you recommend a lesson check to see it we already have it. You can do full or partial searches.
For example for Stairway To Heaven you can search any part of the word or phrase.
Valid searches would be: stair, stairway, heaven.
After searching you will get result(s) telling you if the lesson exist so you can vote it up or how to suggest it.
Aside from being a beautiful song and a great arrangement for those of us who cannot or will not sing, the fingerpicking techniques, timing, dynamics, and physical stretch required to play this song are widely applicable and would make it a great addition at the advanced end of the spectrum.