Don Potter's Education Page
A wealth of information about phonics and spelling. Also includes several free phonics lessons in written and audio format.
The National Right to Read Foundation
This site is especially helpful. They have an online reading grade level test and tons of other useful phonics info. The NRRF also has a list of good books and videos you can use to learn phonics.
The Reading Store
Another good site with phonics information. Their phonogram and sound charts make useful reference charts.
Children of the Code
A lot of interviews with reading experts, and information on reading, neuroscience, and learning.
Free online animated phonics lessons with sound.
40L's YouTube Page
Movies with phonics and sight word information.