I actually didn't realize that - I thought the focus on making sure everything was out for a while so that balance issues could be resolved meant that homebrew was problematic.
Hm, I thought maybe I'd propose the 3rd-party Martial Artist class (from the Advanced Player's Guide), to give the Kingdom of Jade some love, but I doubt anyone else even owns it...
I own it.

I would be happy to entertain proposals for third party content (and like the APG!). The problem with that, unfortunately, is that it isn't as widely owned as WotC rules, and it isn't posted on the boards like homebrew content. But until we get a proposal, I can't say how much other folks would be in favor of approving any given 3PP material.
[sblock=From the Charter]Changing the rules: proposing new sources and mechanics
Any player may propose that the rules be changed, or that new source material be allowed. To do so, the player should create a new thread in the forum with a title beginning with "Proposal: ". In the proposal, they should explain what the proposed change to the rules is, and why they feel that the change is needed. The judges, after allowing time for refinement and discussion of the proposal, will vote by indicating YES or NO in a post in that thread. In order to pass, a proposal must receive at least three YES votes, and the YES votes must outnumber the NO votes by at least two. When that condition has been met for 48 hours, the proposal passes and becomes part of the official rules. If a proposal receives at least 3 NO votes, and NO votes outnumber YES votes by at least two for a period of 48 hours, the proposal fails and the matter is closed.
It is possible that a proposal will neither pass nor be officially closed. Example: A proposal may gain 4 yes votes and 3 no votes and attract no further votes. In such a circumstance, the proposal has not passed and does not become a rule barring a change in circumstances.
A proposal that fails may be proposed again, but not before three months have passed since it failed. Conversely, players may propose to repeal a passed proposal after at least one month has passed, but if that repeal proposal fails, it may not be reconsidered for three months.
A judge cannot vote in his or her own proposals.
Proposals to include new rules content may be made either for specific rules or articles (e.g. "I propose that the text of Magic Missile be amended thusly...", or "I propose that we adopt the rules in the article 'Pimp my Halfling' in Dragon #666"), or for entire sources ("I propose that the Adventurer's Vault be made an approved source"). No published sources will be considered until they have been available to the public for at least three months. This is to allow the D&D community at large an opportunity for discussion and playtesting. [/sblock]
I can see why you'd have the impression you had, since the Charter does go into further detail on published materal. It does have the "I propose that the tex of Magic Missle be amended thusly..." example, at least.
Our current regional bonus system is the only example of mechanical hombrew material that we have at the moment, but it does show we allow non-WotC material. In fact, those were explicitly homebrewed because there was thought many of the FR backgrounds were too powerful.
