Can everyone contact apple and ask them to enable the new open dyslexic font in iBooks, Safari etc...

This forum is for solving technical problems. If you want to contact Apple, go ahead.

By the way, it's possible to embed fonts in both PDFs and iBooks. So if you have a document you especially want to use a specific font with, you can do it. Documentation for iBooks:

http://support.apple.com/kb/HT5072

documentation for including a font in a PDF depends on the software you're using to make your PDF.

Send feedback/suggestions to Apple.

http://www.apple.com/feedback/ipad.html

 Cheers, Tom 😉