Unreal Tournament -Epic Games Information Sites
Start with the Sites.
http://www.unrealtechnology.com/html/homefold/home.shtml : This website is where you can download the UnrealED program.
http://udn.epicgames.com/Main/WebHome.html : This is the main website for developers support. There is a lot of great information on this site. Use the search tool to find it. It also contains the UnrealED 2.0 Manual - http://udn.epicgames.com/Two/WebHome.html
http://www.beyondunreal.com/ : The best Forum for information on UnrealED. Make sure you Search for the answer before posting. The forum does not take kindly to lazy researchers who post questions already answered in the forum.
ETC Earth Theatre Project: This is a great example of where Unreal has been used as a education and simulation tool not as a first person shooter game. http://www.etc.cmu.edu/projects/coyote210/index.html
Useful Links:
Ued Tutorial sites:
www.3Dbuzz.com
http://www.planetunreal.com/unrealed
http://www.unreality.org/blacksway
http://www.unrealized.com
http://unreal.gamedesign.net
http://utu.unrealism.com/ued2help
http://www.birrabrothers.com/drac/unrealt/ut_ued.html
http://www.planetunreal.com/slick/unrealed_main.htm
http://www.unrealism.com/unrealedmax
http://www.planetunreal.com/lode/
http://www.game-edit.com/tutorials/Unreal/
http://www.planetunreal.com/utcity/index3.html
http://www.planetunreal.com/uedlab
Modeling:
http://www.polycount.com
http://www.planetunreal.com/modelfarm
http://www.epicknights.com
http://www.swissquake.ch/chumbalum-soft/ms3d/index.html
http://www.3dcafe.com
Coding:
http://www.planetunreal.com/chimeric
http://www.planetunreal.com/wod
http://www.planetunreal.com/mutation
Textures:
http://www.richardrosenman.com/
http://wadfather.game-edit.com
http://www.planetunreal.com/undulation
http://www.planetquake.com/polycount/cottages/rorshach
http://www.planetquake.com/hfx
http://www.planetunreal.com/texturelab
http://www.planetunreal.com/textureuniverse
http://www.planetunreal.com/forest
Prefabs, Utilities, and useful stuff:
http://www.planetunreal.com/tarquin
http://www.planetunreal.com/fordy
http://www.planetunreal.com/jtonline
http://www.planetunreal.com/prefablab
http://www.swissquake.ch/chumbalum-soft/ms3d/index.html
http://www.unrealized.com
Skinning:
http://www.polycount.com
http://www.planetunreal.com/houseofstyle/
Unreal Tech:
http://unreal.epicgames.com
http://udn.epicgames.com/
Game development:
http://www.flipcode.com
http://www.developium.com
http://www.gamasutra.com