Yup,
totally possible. But you probably want to use switches. As you start chaining more ethernet devices off here, switches will grease the wheels a bit. When you use hubs, all the packets are broadcast on all ports, regardless of the destination of the packet. With switches the packets are routed from the input port to the output port that connects to the destination. This helps lubricate PC to PC communication on the network while other machines go out through the gateway.
Probably on your network it won't be a significant matter, but switches cost about the same as hubs anyway. In fact, I think hubs are getting hard to come by. The last time I tried to buy a hub (I needed to sniff packets) the thing they sold me that was labeled a hub was actually a switch!!! Took me about 40mins to figure out why my sniffer wasn't seeing any traffic!!
