MacBook Pro w/Retina - dual display and ethernet

I ordered the MBP with Retina on the 15" display excited that it will have dual miniports for the 2 monitors but have just realized it doesn't come with an ethernet adapter on the laptop. You have to use a thunderbolt port which leaves me with only 1 port where I thought I would have 2.

So how can I setup 2 monitors and an ethernet cable on this laptop?