Basic Nurbs Modeling

Model a Helmet
http://www.studioexistence.com/sections/Tutorials/CG/Modeling/Helmet/Helmet%201.htm

Modeling A Head using Nurbs-Poly Technique
http://www.3dm-mc.com/tutorials/maya/head/

Basic Curves
http://www.animagraph.com.br/DeathBrain/Basic/curve_tutorial.htm

Spiral Modeling
http://www.christerb.com/tutorials/maya_modelspiral/index.html

Braid Modeling
http://www.christerb.com/tutorials/maya_modelbraid/index.html

Creating Smooth Wireframes with Maya
http://members.shaw.ca/visjes/tutorials/smoothwireinmaya/

Modeling a Spaceship
http://www.ckk.chalmers.se/tutorials/maya/Pages/Lesson5.html

Fish Modeling
http://members.aon.at/bulletin/sushi/

Modeling a Webcam
http://www.io.tudelft.nl/id-studiolab/compvis/learning/philips_webcam/webcam.html

How to make rounded corners with nurbs
http://www.gmask.com/tutorials/corners/corners.shtml