I am very interested. I am also, however, thousands of miles away. Do report back.
For the sake of completion, I now do so! The memorial concert was held yesterday evening, lasting just under an hour and featuring some really wonderful singing from the Sussex Uni choir (Purcell, Tallis, Bruckner and Monteverdi) as well as the new pieces. It was a very touching and lovely occasion, and much appreciated by David's family. We were expecting about 50 people, but in the end more like 90 turned up.
Also, for those who expressed an interest in David's unpublished work earlier in the thread, I can report that two essays will be forthcoming, one on music in fascist Italy, the other being the paper on Clementi David gave shortly before his death. I'll report when I have the details. There is also the first (extremely illuminating) chapter from his projected Berio biography, but the fate of this will be determined by the commissioning editor and publisher...