That’s right, you can now get the first public Alpha release of Adobe Apollo. The runtime, SDK, developer downloads, showcase gallery, the whole shebang. It’s available here: http://labs.adobe.com/technologies/apollo/ 
Also of note, the official press release from Adobe available here: http://www.adobe.com/aboutadobe/pressroom/pressreleases/200703/031907ApolloLabs.html 
There should be tons of chatter and posts over the next few hours and days, so keep an eye on the MXNA agregator, especially the Apollo Smart Category 
Apollo Documentation available here: http://labs.adobe.com/wiki/index.php/Apollo:Documentation 
You can also grab a PDF version of the O’Reilly Apollo for Flex Developers Pocket Guide  by Mike Chambers, Rob Dixon and Jeff Swartz.
Once you’ve got the runtime installed check out some sample applications here: http://www.adobe.com/go/apollo_samples  as well as several other now public applications making their way out through MXNA .
A nice introduction to building your first Apollo app by Andrew Muller  can be found here: http://labs.adobe.com/wiki/index.php/Apollo:Articles:Building_Your_First_Flex-based_Apollo_Application 
Also from Mike Chambers  – he spent a couple of days down at the Lynda.com offices to put together a complete video overview / introduction to Apollo and the videos have just been posted. They are available for free from from Lynda.com here: http://movielibrary.lynda.com/html/modPage.asp?id=378  The videos cover everything you need to know to get started with Apollo development.
As an aside, I actually did some training videos for Adobe back in December/January through the fine folks at Lynda.com  – I can’t mention what exactly the videos are about until after the 27th of this month, so stay tuned for more info on that.
Vidoes from Apollo Camp are now available at: http://video.onflex.org/ 
Great aricle about the Local File System API in Apollo by Darron Schall  – read it here: http://labs.adobe.com/wiki/index.php/Apollo:Articles:Apollo_Local_File_System 
Great series of entries about Apollo with examples and source by Rich Tretola on his blog .
I’ll continue to add more relevant links to this entry as they come my way. More to come…