I have very little knowledge regarding all things network related, so I thought I'd ask here first.
I live in Ireland and in our household we have a desktop, two wi-fi enabled laptops and a printer, and our internet is provided by clearwire wireless - you can see the receiver on the left of the following link:
not seen these before but as it appears to only be a moden. I'd assume it would work like a cable connection.
But make sure the router is cable and not ADSL
If as you state your going to connect the printer to the PC, a router with printer port wouldn't be neccessary. You would only need this feature if you wanted to share the printer with other PC's and not have your desktop PC on while printing. Anyway routers with USB connections do seem hard to come by.