Photo by Tharum, found on his Facebook Profile
That's Sopheap in the red shirt. I met her in Cambodia last month. I spotted this photo in Tharum's Facebook photos the title is "Quiet Vigil Outside Burma Embassy in Phnom Penh." Mean Lux has a set on Flickr here and you can see a photo of his red t-shirt. I first heard about the Cambodian support of these efforts via Mean Lux's Facebook profile and his blog post.
Kalabird, an expat Cambodian blogger who is now back in the US, has written an excellent piece entitled "Empowering Myanmar, One Blog at a Time"
I also learned on Facebook that today is:
IN SUPPORT OF OUR BRAVE FRIENDS IN BURMA: MAY ALL PEOPLE AROUND THE WORLD WEAR A RED SHIRT ON FRIDAY SEPTEMBER 28.
JOIN THIS GROUP:
There's a photo group in flickr too.
Update: Just found Preetaim Rai's roundup on Global Voices.