http://stackoverflow.com/questions/1371407/has-anyone-had-success-using-custom-otf-fonts-on-the-iphone
Must you use an otf font on the device or can you convert it to ttf? It is relatively straightforward to convert an OTF font to a TTF font using a tool such as
fontforge, perhaps that would be an easy solution.
http://sourceforge.net/projects/fontforge/postdownload?source=dlp
