I am so happy to see your question and it thrills me that Harnu can be used to share these sources. I recently was in Slovakia for their very first peaceful PRIDE (last few years Neo Nazis beat people up-not enough police). It was an incredible moment in GLBT history for E. Europe. Budapest PRIDE this year was also safe and bigger than its ever been. I know this is not Vietnam but in the spirit of sharing GLBT history, here are few pics. I have couple contacts in SE Asia; I'll see they can help you out. Cheers on your search!

Here is short video I took in Slovakia's PRIDE: http://www.youtube.com/watch?v=5vWRmNpALo8&feature=plcp

Uganda Gay Pride parade. I'm assuming you all saw this:

http://globalvoicesonline.org/2012/08/13/uganda-against-odds-gay-pride-events-take-place-in-entebbe/