Quite. It was known during season 1 that Carleton Cuse, Damon Lindeloff, and J.J. Abrams (The main writers and producers of Lost) had worked out the ending to the series already. The only season that began to meander around was season 3 because the network had not finalized an end date. Once that was negotiated it was right back on track and it is amazing how few plots holes exist in the epic storyline of LOST...which has only one more season remaining.

The 2-sided disk is the only format which will allow for a single disk with two full-quality formats on it. Blueray could do the same thing. In fact, if HDDVD/SDDVDs get put onto a single side as 30GB and 4.6GB... a Blueray which gets packaged as a 2-sided disc with a better quality SDDVD actually sounds even better.

If bluray discovers a similar way to make a third layer then a really creative disk could actually store all three formats on a single disk using 2 sides (hddvd on one side, bluray on the other, and standard dvd split between the two sides).