Update on Mar 23: Now it's blocked again :( - even with OpenDNS, I cannot access Youtube in Beijing!
Update on Mar 07: Now the block has been removed, we're still now sure why this happened. I really hope that we could stop updating this post by now.
Update: Now Youtube is finally, finally, completely unable to access even in Beijing (northern China). Fuck GFW!
Well... many friends told me (via IM and Twitter) that Youtube, the most popular video sharing site is now blocked in southern China. The ISP is China Telecom, which covers mostly in southern China.
I am so sorry to hear this news. It's such a sad March. As far as I know, Youtube (Google) is doing a very great job in China and paid a lot for a CDN in China. Not matter what ISP you use, Youtube is as fast as any local video site. And the most outstanding feature is that Youtube offers a "embeddable" version with smooth fullscreen-mode and search support!
PS: Fortunately, I'm in Beijing now, so I can still visit Youtube. But I am not sure whether I can still enjoy the clips from Youtube tomorrow.
God bless Youtube!