cufon or typeface - need English LTR and Arabic RTL fancy heading

I need 开发者_高级运维to build a site that uses cufon or typeface.js for headings. But I am struggling to get a definitive answer on whether these will support RTL text.

Does anyone have experience using these for arabic / RTL text? And if they aren't suitable, can you recommend an alternative?

I tried to use cufon for 'Persian'.As you may notice , It was told that -on github project page- the developers have plan to make support for rtl either. It's really awsome solution but still got some problem.