Well, you have to go for some compromise if you want a Like button painlessly. You may create html design in such a way user doesn't suspect that there are html elements.
That's is kind of complicated and and involves 3 parties (flash, TW/html and Facebook/html), i.e. you won't be able to produce .exe and .swf. Because of this it is also a bit complicated to develop easy-to-use add-on.
So, i doubt that we will see it soon, but of course i can not speak for EP. Let's hope for the best :) Everything is possible ;)
My Tourweaver components: http://www.optitecha.lt/categories/3