In the past, though I loved the idea behind laszlo, it was hard for me to come up with a reason to force my users to use Flash. That was before Ajax gained popularity. With RIA (Rich internet applications) invading the market, I had been, for a few months, pondering about re-investigating laszlo to see where it stands.
I can see Laszlo getting a lot of positive feedback over the next few days. This is probably the best move they could have made. I wish them all the best.