really good tutorial about basics - create you first level in 8 simple steps!
http://architectonic.planetunreal.games ... level.html
Several video tutorials. Note: you need to register if you want to download the tutorials (it's free):
http://www.3dbuzz.com/
tutorials about gameplay and lightning (if you wont see the page - refresh it):
http://www.planetunreal.com/teamvortex/davidm/
Very good tutorial about the lightning (written by Hourences, the author of Rankin, Redkin, Torlan, Dawn and few other insanely-high quality maps
http://help.hourences.com/booklighting.htm
Tutorial about gameplay by Hourences:
http://help.hourences.com/bookgameplay.htm
Few other tutorials (BSP, Architecture, Sounds, CTF gameplay tutorial, Texture & terrain tutorial. Note: those tutorials don't cover the technical side, they cover more the art side):
http://phalanx.planetunreal.gamespy.com/tutorials.htm
Unreal Wiki, Unreal Editor Wikipedia:
http://wiki.beyondunreal.com/wiki/
Tutorials about more advanced features, like map optymalizing etc:
http://www.angelmapper.com/
Onslaught map making tutorial:
http://www.psyonix.com/OnslaughtMapTutorial.shtml
When you finish your map, you will probably want to share it, so you will start looking for a place to upload the maps. Here are links to few sites where you can upload your maps:
Unreal Playground:
http://forums.unrealplayground.com/foru ... .php?f=126 - registration needed. (free)
Nali City:
http://nalicity.beyondunreal.com/ - registration required (free)