The preview release that will lead up to the RC build of 3.5 has been released but not as direct download. Download beta 4 @ http://www.mozilla.com/en-US/firefox/all-beta.html then go to Help and select Check for Updates. It will install the preview release.
Check it out 
Here is a shot of my customized 3.5 preview setup
Here are the links for: Tuesday, January 13th 2009… sorry for being so late at posting this i got distracted by a new iPod Touch app.
Video: A stupendously exciting demo of Ford’s Sync 3.0
Video of Sony’s NWZ-X1000 OLED Walkman In Action [Walkman]
Ubuntu 9.04 Boots in 21.4 Seconds
Twitter Decides To Hire Somebody Whose Job It Is to Make Money
Troll Touch adds aftermarket touchscreen tech to Apple LED Cinema
The Sanctuary Crew Sure Does Like Their RED Cameras [Red
Streaming technology makes its presence known at CES
So long, CES 2009
Sling Media loses most of its top brass
Shuttle's X50 all-in-one desktop pulls up alongside the Eee Top
Rumor: Bioshock headed to the Mac
Revealed: The Times Made Up That Stuff About Google
Piracy prompts iPhone developer to put ads in game
Palm's Mojo SDK for webOS in pictures
New XP and Vista drivers allow you to use your PS3 controller on your PC
More details on D-Link's upcoming 7-inch SideStage USB monitor
Mobile Payments Getting Traction On Social Networks, But Fees Are Sky
Mini DisplayPort Adopted as Part of Official Spec
Microsoft challenges Apple's GarageBand with Songsmith
Microsoft builds pretend retail store, wants to play house later
MacMods of the Year for 2008 announced
Mac clone maker Psystar claims it bought OS X from Apple
LEGO announces digital camera and more
Kaspersky, Sophos to block UK police hacks
iTunes DRM-Free Files Contain Personal Info
iPhone dev asks cracker to stop, cracker says to sit on it
Hold your breath! Report states iPhone Nano coming in June!
Google Scoops Up Del.icio.us Founder
Google offers help transplanting your blog
Europe may ban Plasma screens in energy use crackdown
DivX 7 Adds Support For Blu-ray Rips (H.264/MKV)
Dearest Microsoft, I hacked you. Love, the friendly Russian hacker
Beyond WiMAX: Gigabit Wireless
Asus CEO Confirms Low-Cost Eee Phone Is On The Way [Eee Phone]
Apple Patents iSight Cam Behind Laptop Screen, Will Hear From Errol Morris’s Lawyers [Apple]
Apple Allows 3rd Party Web Browsers into App Store
AMEX Digital BD-P1 – a cheap Hong-Kong made Blu-ray player