Update - A video is now available, see below. Please check the Algalon the Observer page for more details on skills and achievements.
Update - That's official, you can only fight Algalon one hour per week!!!
Update - A few important posts.
Update - Algalon seems to despawn after one hour of fight. This is most likely the same mechanics as Vaelastrasz allowing raids to try it only one hour each day.
Algalon Preview by Wraith
Wraith (EU-Ysondre) defeated all the hard mode encounters (10-Man Ulduar) required to access Algalon, the hard-mode only boss of Ulduar. Below are a few screenshots of the fight, you can also check the Algalon the Observer page for a few more details on his skills.
Thanks again to Wraith for the screenshots.
Video by Underground Kosmonavts
Underground Kosmonavts, another european guild from EU-Ravencrest also released a small video preview of the fight.
HTML Code:<object width="560" height="370"><param name="movie" value="http://www.youtube.com/v/NrXYwYCYOX8&hl=en&fs=1&showinfo=0"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/NrXYwYCYOX8&hl=en&fs=1&showinfo=0" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="560" height="370"></embed></object>