There are indeed a *lot* of PHP tutorials and articles out there. Most of them are of little value in general, or even misleading readers into bad practices (as referenced by Christian Heilmann in a recent post on Smashing Magazine<http://www.smashingmagazine.com/2011/12/27/hitting-the-ground-running-along-with-faceplant/>). However, most of the *best *PHP sources will teach you web-development techniques that you can do in Python (or more precisely, are already easy for you to implement in web2py).
As a developer who is also growing in my understanding of the best practices, I recommend you look around as much as you can for great articles on best practices. I have learned a lot from the following places: - A List Apart <http://www.alistapart.com/> - I would *start off here*. In general, their articles do a great job of establishing practices you want to emulate. - Smashing Magazine <http://www.smashingmagazine.com/> - They post one article a day, and the quality varies significantly, so be vigilant. Most articles focus on front-end and trending topics in web design. - Smashing Network <http://network.smashingmagazine.com/> - This is a list of recent web-related blog posts curated by the Smashing team. The quality varies even more, but there is enough there to scan through for value. - This Google Group - You will learn *so much* from the talented people here. - Paul Irish <http://paulirish.com/> and his Google+ page<https://plus.google.com/113127438179392830442/posts>- Paul is a young developer with a passion for making the web better by sharing information. Most of what he shares is front-end specific, but makes <http://paulirish.com/2011/web-browser-frontend-and-standards-feeds-to-follow/>life <http://html5boilerplate.com/>easier<http://paulirish.com/2008/conditional-stylesheets-vs-css-hacks-answer-neither/> . - Christian Heilmann <http://christianheilmann.com/> - archives just about every talk he gives on various web topics. This list isn't as exhaustive. But I would also like to put out a request for other places to look for web development. Being relatively new to Python and the server-side myself, I don't have a go-to list for that side. Anyone else have ideas?

