Learning Electric -- Contains video tutorials for computer software applications
Survey Monkey - Free site for creating short surveys
4Teachers - Contains multiple links to valuable sites for teachers
SchoolNotes - Free teacher web pages
Podomatic - Free site for hosting audio and video podcasts
Audacity - Free audio recording software
Florida Educator Accomplished Practices - Outlines the EAP's adopted by the Florida Department of Education
Marco Polo - Lesson plan site
United Streaming - Downloadable videos and video clips
Discovery School Kathy Schrock's Guide - Categorized list of sites useful for enhancing curriculum and professional growth
KidzOnline - Tech training and lesson plansS
March2Success--Standardized Test Preparation Course
PC Webopedia--Glossary and articles on the Internet, Hardware, and Software; Term of the Day
Free web design sites - W3 Schools.

It has very straight forward introductory tutorials to HTML, XHTML, and CSS. They also have more advanced tutorials for things like Java Script, ASP, PHP and lots of other acronyms. Along with the tutorials they offer try-it-yourself examples that let you play with the code and see the effects of your changes immediately. The site is kept up-to-date and the tutorials deal with the most recent web standards. It's an all round great resource for learning about web publishing.
Internet Use Tutorials - They have tutorials on most everything on the web including Flash and HTML.  It's free.  
Macromedia Product Tutorials - Flash, Freehand, Dreamweaver, Fireworks, CSS ASP, and PHP tutorials