Best way to share iPhone's Internet with multiple computers?

I've just moved house and will be without an official Internet connection for two weeks. I the meantime in was hoping that I would be able to share my phone's connection with everyone in the house, that would mean 3+ computers.

I know that I can't tether to three computers at the same time but is there a 'best' way to share the connection between multiple computers in multiple rooms?

 

I'm not in the US so don't have any of the AT&T restrictions. ATM I have 3GB of data for the two weeks but can double that using credit already on my account, I doubt that we'd use anymore than that over two weeks though.

I'd prefer not to jailbreak. It looks like my best/only option without jail breaking is to tether the phone to my computer (mac) and then use internet sharing to share the connection over wireless?

edit: I'm trying the above solution atm and having problems connecting to a windows 7 laptop.