Alphabet poem (each letter with about 5 easy words starting with the letter, no illustrations)
http://www.sunniebunniezz.com/educational/abctextpoem.htm

Interactive page with the sound of the letter and a picture of an example
http://www.learningplanet.com/act/fl/aact/index.asp

Sing Along Songs : a song for each letter, with the text and illustration for the words used as examples
http://www.mrsjonesroom.com/songs/alphlist.html#alph

Those three sites come from Mrs.Alphabet website recommended by Pascale Aucoin on e-teach. You can find many other useful links on this page:
http://mrsalphabet.com/links.html