The US government has released some details, in the forums I check, the video has not gone online. I expect the as-sahab production to be downloadable soon, until then I highly recommend the SPIEGEL article and Washington Post.
The forums are full of the usually sympathizers expressing their feelings for “the sheikh” – usually about 1-2 GB video material per week (not mentioning the documents such as GIMF) are posted – as you may imagine, the “soon, Godwilling” announcement of the OBL video has had several thousand visitors since Thursday (for example, 7,879 clicks in just one radical forum).
As soon as I have the vid, I will watch the bullshit (there goes my weekend) and keep you posted.
http://www.washingtonpost.com/wp-dyn/content/article/2007/09/07/AR2007090700279.html?hpid=topnews&hpid=topnews
http://www.spiegel.de/politik/ausland/0,1518,504568,00.html
Online Jihad: Monitoring Jihadist Online Communities 
allhe akebar mine america wa israil
walle 3izato lile allhe wa rasolihe wel mouemine wala kine monafikine la ya3elamone
eislame 3izatona wele qorane dostourona wele djihade hayatona wel chahadate fi sabile allhe asma amanina wa mohamado rasole allhe qoudwatona wa imamona
السلام عليكم حياكم ربي الذي احياكم في ذمته