An interesting and informative blog on Irlen syndrome. Lots of great info and personal stories. Updated frequently
Carol F. Zuccone's website. She's an Irlen screener and psychologist. The site is available in both English and Spanish
(An Irlen site for Spanish speakers) Un sitio sobre Irlen para los que hablen español. Tiene muy buena información y algunos videos con subtítulos en español
You should also check out Irlen.com's links page if that wasn't enough for you