I found this on the wdinfo website: under recreation/ fireworks (sorry I can't post a url yet)
MAGICAL FIREWORKS VOYAGE
The Magical Fireworks Voyage, which has been offered exclusively to guests traveling as part of a Grand Gathering group (8 or more), will become available to all, regarless of party size, starting March 1, 2009.
When this change goes into effect, the price will increase to $53.99 per person ages 10 and up, $30.99 per child ages 3-9.
It is expected that this experience wil undergo some changes, including a new name. Stay tuned to the DIS for future updates.
When I was calling the Disney tour line for a tour - I asked about this. I was told that they would start taking reservations March 1 but that the reservations would be for Wishes cruises beginning in May (maybe even a bit later - 60-90 days out).