But the more interesting question is:
What will they summon?

It is safe(I think) to say that Ifrit,Ramuh,Shiva,Odin,Leviathan,and Garuda(And a giant Moogle?) won't be accessible to the summoner class/job according to the interviews.

So..do they get some of the lesser summons? spirits?
Must know. Although, I would prefer info on the beastmaster-esque job more, I'll take any pet info I can get O_O