The Solid Modeler's Blender Survival Guide
Blender Tutorials
Part 2: Topology and the Motor Pinion
Blender Quicktips
Quicktip 1: Extrude "In Place"
Blender Tutorial Links
Precision Modeling with Blender is an excellent set of video tutorials! My new favorite introduction to Blender for solid modelers! There's additional tutorials on this power-user's site!
The Blender Manual is actually pretty useful, so here it is!
The Noob-to-Pro Wikibook I have my share of disagreements with how this one's organized: it focuses on a lot of things I don't think a new Blender User should bother with early on, but if you sit down and grit your teeth through it, you'll come out the other side knowing what you need.
This big pile of tutorials is useful-- stick to the mesh stuff if you're only doing this for solid modeling...