I wish I knew more 3PP's, especially with the decline of Dungeon and/or not being able to use or like all of the modules they do put out.
I wish there was a way for common people could post homemade modules. Granted some or most would need work from the DM to fit it to his game, but some of the Dungeon articles do as well. I would like to get stuff in a pinch and use it in my home game w/o getting in trouble. You would think that Wizards would do this. If it is not paid and given for free to subscribers I think more people would not feel like they are getting gyped. Some of the reason is time to make them look better and not have blantent rules problems, but put everything under Unearthed Arcana so it is optional. They could look like the RPGA modules, plain and without artwork, but are useable and something would fit with what you need.
Apologies for the rant.