well, unless you turn on internet connection sharing on your PC...you aren't going to be able to use the internet on 2 devices without a router.
I would strongly recommend the purchase of a router. You can get a TrendNet from NewEgg for $22.
Newegg.com - TRENDnet TW100-S4W1CA 10/100Mbps DSL/Cable Broadband Router 1 x 10/100Mbps WAN Ports 4 x 10/100Mbps LAN Ports - Wired Routers
The router gives you basic NAT firewalling and easy port forwarding capabilities. Well worth the $22 just for the firewalling capabilities.
And you really don't want a HUB. These share bandwidth and experience collisions. They are nowhere near as efficient and as fast as a switch. If you do decide to NOT go with a router (which has a built-in switch), buy a switch rather than a Hub. With a switch you get full duplex transmissions...so no more collisions.