The IPDF have defined a way of encrypting the fonts in an ePUB, so that they can't be trivially extracted and reused. I should have mentioned this in my post to avoid confusion.
See "Font Embedding for Open Container Format Files"
http://www.openebook.org/doc_library...glingSpec.html
I agree that the licence probably wouldn't cover just including the bare font in the ePub archive.
Quote:
Originally Posted by HarryT
Be careful with this. The licence permits fonts to be embedded. Fonts in ePub files are not embedded, as they are with the PDF file, but are simply contained in the ePub ZIP file, from where they can simply be copied by the user and installed on their own system. The point about an embedded font is that it becomes a part of the document, and cannot be "unpacked" and re-used by the document viewer.
I honestly don't think the licence you've quoted is valid for ePub usage.
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