CSS - Best Places for Information

Using CSS3 tutorial - a screencast of how to use CSS3

CSS3 techniques
Front End Design Conference Video - talks on Expression Engine use
CSS Floats - a tutorial
CSS Layout Techniques - a lot of reference and help
Tutorial: CSS3 Multiple Backgrounds & Transparency used TOGETHER - Jonathan Snook

Layouts

Layout Reservoir - BlueRobot.com
8 Definitive Web Font Stacks - sitepoint.com insightful article
Making background image "click-able" - xavisys.com tutorial article

Best Joomla Templates

Optimus by Joomlashack - a free template to start with and modify; you can buy a "pro" version but if you're starting out with Joomla!, use the free one first.
Rocketheme.com - a subscription set of templates that are well worth the money with great support help
YooTheme.com - a subscription set of templates slightly more modern box edgy with great support and extensions
Shape5.com - a subscription set of templates with great support and extension development; These guys seem to be lesser known but their templates are always great.

Joomla Template Tutorials

Compass Designs - Joomla 1.5 Template tutorial

Joomla Tidbits

I want to find what module positions my template has already. - Dart-Creations/Joomla Team tip (add ?tp=1 to end of domain name)
Better Backend Editor with more functionality - JCE - Overview by Dart-Creations