From his Twitter:

Jeff Madsen ‏@JeffMadsenobv
peeps! message me for interest in private poker lessons; have been doing it for couple months now, client base growing. guaranteed results!!

Jeff Madsen ‏@JeffMadsenobv
one of my poker students just made a final table in Tahoe when I met her she was a beginner now she's already getting results! could be u!

Watch out, Maven?

https://twitter.com/JeffMadsenobv