Yes, the MoCA adapter bridges, so you can plug in a small hub or (ideally) switch and have more than the one connection at the far end. I'm doing the same thing to plug in my Premiere, Apple TV, Blu-ray player and Series 2 Tivo.
That's exactly what I did. The advantage is that you can also turn them into wireless access points. I had a (nearly) dead spot in my house. I turned the wireless on one of the MI424WR and no longer have any wired or wireless issues.If you're comfortable with some basic router configuration you can buy an Actiontec MI424WR router and turn it into a basic switch with built-in-MoCA bridging. It saves on the number of components and they're cheaper than the dedicated bridge products.
You can find them pretty cheaply on ebay and use these instructions to configure them.