Flipcode - Daily Game Development News & Resources

Tutorials :
http://www.flipcode.com/tutorials/

Terrain Texture Generation - by Tobias Franke :
http://www.flipcode.com/tutorials/tut_proctext.shtml

Generating Terrain Textures - by Yordan Gyurchev :
http://www.flipcode.com/tutorials/tut_terrtex.shtml

Fast Terrain Rendering Using Geometrical MipMapping - by Willem H. de Boer :
http://www.flipcode.com/tutorials/tut_geomipmaps.shtml