Interesting question, and I'm unsure of the answer. And it's potentially a very important one.
If Hollweg has a contract with the Rangers, it got suspended due to the lockout and he can sign anywhere. If he's got a contract with the Pack, he must report to Hartford.
Given that he's been on all the lists for Hartford's pre-season roster, I assume he signed with Hartford (though he may have signed with NY first, waited until the lockout, and then signed an AHL deal with Hartford. Labarberra, Ortmeyer, Valiquette, Grenier, and others all did the same thing.)
But it's hardly a given . . . guess we'll see where he ends up playing. Though it seems like it's going to be the AHL/ECHL at this point.