Epic Released Unreal Editor 3 for FREE!
UDK December beta is out guys! http://udk.com/udkdownload.html Go grab and have fun. Here is a list of updates. 
http://udn.epicgames.com/Three/DevelopmentKitBuildUpgradeNotes.html#Dece...
The January UDK beta has been released! 
Here are the notes..
http://udn.epicgames.com/Three/DevelopmentKitBuildUpgradeNotes.html#Janu...
and as always, you can download at UDK.com
I got mine from the UDK site 
http://udk.com/download.html (top right, in blue)
Always guaranteed to be the newest release!
February UDK has been released. Of course you can grab it at UDK.com Build notes are at
New realtime color picker has been added. you guys should enjoy that one! 
February UDK has been released. Of course you can grab it at UDK.com Build notes are at
New realtime color picker has been added. you guys should enjoy that one! 
Thanks again for the head up mate 
Much appreciated!
March UDK is available guys! Download away at http://www.udk.com/download
The release notes and ALLLL the new features, which you guys should check out, is at http://udk.com/news-beta-mar2010

April UDK is out guys! Some awesome additions. Check the upgrade notes. Our GDC demo map is in there as well.
http://udn.epicgames.com/Three/DevelopmentKitBuildUpgradeNotes.html
The May UDK is out, go get it now! Check the upgrade notes.
Hey guys iv a quick question, iv got UT3 and GOW for the pc. Both come with editors. Is this the same thing as the UDK? also seeing as i have both games is it possible to download the UDK from the website but still use the asset packs from each game? can GOW and UT3 assets be used in the same scene?

Just a heads up guys, we've released a Beta 2 of the UDK. Mainly some hotfixes for anyone who had any kind of install types of issues, but please grab nonetheless!
http://udk.com/udkdownload.html