It appears questionable (see the fb comments below) whether Krakatau actually erupted yet, as it seems plausible that the video in Metro TV news was an older one.

To my knowledge, Anak Krakatau have not produced any eruption at this point (4/10/11) in regards to its current status of increased seismic activity. Indonesian media have not yet to report any visual eruptions, and my source at the village/town of Carita-Anjer said that there were no eruptions of today/afternoon. The source you have stated above does indeed show footage from Anak Krakatau, however I think it is old footage, because they mention nothing in the video-report of any eruption, rather stating that the observation post in Banten cant observe the volcano because of poor visability/clouds.
However, this is most likely the start, of a new eruption phase, as you stated. I will visit the area this weekend to observe the new developments.

Thanks for posting Tom. We new it would not stay quite for long.

Michael

Don't give them any ideas, Mark Burns! Krakatoa and Sakurajima can sit quietly glowing for hours to days and then abruptly go off in a big explosion without any warning.