re:source

Media Theory
http://csmt.uchicago.edu/glossary2004/navigation.htm … media theory glossary via U of C

HTML + CSS:
http://htmldog.com/ … intro tutorials
http://www.cssplay.co.uk/ … cut and paste advanced CSS styling
http://htmlpad.org/ … great for quick cut and paste hacks
http://www.w3schools.com/ … tutorials on specific tasks

HTML5
https://developer.mozilla.org/en/HTML/HTML5 … HTML5! Yes!
http://mozillapopcorn.org/popcorn-maker/ … make dynamic audio and video content

Web 2.0
http://www.wordle.net/ … generate some text clouds
http://www.picnik.com/ … free online image editor
http://www.colorzilla.com/gradient-editor/ … gradients
http://www.stripegenerator.com/ … generate some stripes

Video
http://corp.kaltura.com/ … open source community
http://www.youtube.com/editor … youtube has an online editor
http://www.moviemasher.com/ … these open source mp4 editors could be useful
http://www.pixorial.com/ … and one more

Photo
http://pixlr.com/ … basically Photoshop 4.0
http://www.lunapic.com/editor/ … reflection animation is cool
http://www.sumopaint.com/home/ … Photoshop 6.0?

Data Viz
http://www.r-project.org/ … wow your econ prof
http://www.timetoast.com/ … timelines
http://www.hongkiat.com/blog/22-useful-chart-graph-diagram-generators/ … a lot of chart makers
http://processing.org/ … Processing (I am learning it now.)