*EnterstheRebeccaexpert* :P
REBECCA is planned to open on B'way in the 2010/2011 season. Before that they are going to do a try-out in Toronto/Canada hopefully still this year.
What happened in London was the first reading of the show. Since Michael Kunze lives in Germany, Christopher Hampton in England etc etc they decided it would be cheaper and more easy to gather the team in England.
However there are no plans for Rebecca to be staged in the West End so far. Next year productions planned so far are Budapest, Czech Republic and the return to Japan. and of course the Canadian Try-outs.
And just to satisfy your curiosity, the Reading Cast was lead by Lisa O'Hare ("I") and Julian Ovenden (Maxim) joined by Anna Francolini, Susannah Fellows, David Burt und Jessica Martin.
And if you have any questions you would like to ask Michael Kunze himself, you can always ask him directly
here (you can write in english, and he will asnwer in english)