X-Plane 10.04 is out for beta. A few notes:
To get 10.04, you must run the updater and check "get new betas as well as updates". The updater will not get you a beta unless you specifically ask for it, and X-Plane won't nag you to update if the patch is only in beta. (This is our preferred method of running betas, and all future betas will be like this.) There are some pretty major fixes to ATC and AI aircraft behavior, so it could be a beta worth getting.
We are starting to transition more of our various websites to WordPress; this is an on-going process. The eventual goal is to have all of our various web info into WordPress (on either the main site or the "developer"* site, which will grow out of this blog) and drop the wiki. MediaWiki makes everything possible when it comes to content management, but it makes nothing easy, and controlling spam has been a real problem. Eventually all of the knowledge-base articles that the sim can link to now will be browsable from those sites, but for now we're still working on building up the infrastructure in our few free moments.
And speaking of developer resources: I am working on a release of scenery docs and updated tools; it'll take a little bit to get everything together. I am getting hammered with requests; a complete release should get most people where they need to go, so I am trying not to jump in and write one-off emails answering questions; better to focus on permanent docs I think.
Finally, please don't email to ask me "did you fix my bug yet." If it's not listed as fixed in the release notes, it's not fixed. We're trying to be accurate in the release notes so that you don't have to ping us every single release, which burns your time and ours. Not all bugs will be fixed this beta; we have enough high priority ones that we're going to get fixes out as quick as we can.
* The developer site will include aircraft, scenery, and ATC authoring info; the SDK website will remain separate, as LR doesn't own the SDK IP. (It's more like FSUIPC that way.)