of wireless router will be suitable but some are more suitable than others.

I prefer Linksys but do try to avoid the ones that offer none standard wireless speeds.

The way I understand it, I will be corrected if I'm wrong, is that with two computers connected to a wireless router, the router defaults to the lowest speed. In this case 802.11g (on the PC)

Of course you could always have either of the two computers connected via ethernet cable to the router but wireless is more convenient for the macbook

Take a look around your local big box electronics store for 4 port wireless routers. Linksys, Belkin, DLink all make decent ones. (that is my order of preference)

Let us know how you get on

P