There are some great start up lessons on Scott Ranney's site Learn Jazz Piano and LessonRating.com has useful resources and reviews the best piano lesson sites online. Somewhere along the way one of the many sites I visited recommended Mark Levine's "The Jazz Piano Book" as the best seminal resource available. So I "acquired" it and having worked through the first few sections, can recommend it highly as the explanations and examples provided are very clear and informative. I really feel like I am understanding the jazz process far more than my futile attempts to do so many times on the guitar. It all makes so much more sense on the piano and I am absolutely delighting in the new vistas that are opening up for me, following my decision 6 months ago, to take up the piano seriously! I have just completed an order for an official copy of "The Jazz Piano Book" along with 2 of his other publications "The Jazz Theory Book" and "Jazz Piano Masterclass with Mark Levine" which delves exclusively into Drop 2 voicings. Magic!