You can return to the mother ship via teleporter beacon that you find buried in the ground when you return after you complete the main quest line, but there aren't any other quests, and the only real advantage of returning to the mother ship is the weapons. You can only go back to the bridge and part of the engineering core.
It's already out. Just youtube "Mothership Zeta trailer".
Mothership zeta is not on earth it is orbiting space the only way to get there is by going to the alien crash site and being abducted
no
you find it northeast of mdlp power station
once you have completed mothership zeta,everything but Engineering Core, The Bridge, Steamworks, Holding Cells are inaccessable, and the MPLX Novasurge cant be obtained UNLESS you hex/hack it
Mothership Zeta is not coming out on CD, however, it will be packaged with the Fallout 3 GOTY edition which comes out in the fall of 2009. The GOTY edition will include Fallout 3 and all DLC in one package.
yes you can use them anywhere.
I has. it came out on 8/3/09.
click the link. [don't worry about it being flagged.]
Yes.
By yourself, no. You have to pay someone to fix it.
No, however to get more Alien weapons you may purchase the 'Mothership Zeta' DLC.