With LH buying the 45% stake in SN this week. I can see BRU followed by FRA being there next routes. They have already or about to move into AF/KL main hubs.
If by Jetstar2 you mean Openskies. They will not move into LGW or any UK airport. As it has been set up to go into direct competition with BA's competitors and not BA.
By end of 2009 the route network should be
EWR to ORY
JFK to ORY / AMS / BRU / FRA / MXP and DUB.
As already mentioned by another member that aircraft number 3, G-CPEI should be online by end of Feb. So expect another route announcement in late Novemeber, early December.