Well, not really.
The website still says
"5 Nov 2010 - 7 Nov 2010 / Roundhouse Main Space
Event not yet on sale
'Information is not knowledge. Knowledge is not wisdom. Wisdom is not truth. Truth is not beauty. Beauty is not love. Love is not music. Music is the best...' Frank Zappa
To celebrate what would have been Frank Zappa's 70th birthday, Zappa at the Roundhouse is a three day festival from 5–7 November that will celebrate the life and music of this legendary American artist. The programme includes performances of music drawn from across his vast range of compositions, screenings of rare film footage, world premieres of unheard Zappa material, Q&A sessions with members of the Zappa family and music masterclasses with various members of Zappa's backing bands. Full programme and event details to be announced soon!"
Which could actually mean a lot. Or not...