i think it will be on the market in do time, i remember a while back when the first cd-rw came out with 2x speed :), it was like 200$ at best buy, and people before that were also saying it will cause this kind of problems, that kind and stuff, but look at the burners now cd-rw, dvd-r's, lightscribe dvd-rw dual layerd( got one, theyre' nice) and all kinds of others.
again i think it will be release but the price for the umd's will be equal to buying a umd movie in store.