On May 22
nd the Matrix Trilogy will hit
HD-DVD in the states (which may as well mean everywhere else too as it's still region free!) in two forms.

Not due to hit Blu Ray until later in the year (possibly due to few / no Blu Ray players supporting the IME) , The Ultimate Matrix Collection and the Bog Standard Matrix Collection, coming in at $119 and $99 respectively.
There's more stuff about it here. Whether or not it will have the same effect that Casino
Royale did for
Blu-Ray in the states, we'll just have to see.
Perhaps releasing the discs separately may have been the best bet? Not everyone loves the sequels, and not everyone is happy to shell out that money for a format that is still trying to prove itself...