Originally Posted By: Dignan
Still, $30 for a dongle as simple as an ethernet adapter is kind of unreasonable to me. Hopefully there will be third party options available for cheaper...

For Thunderbolt->Gigabit ethernet, $30 is actually pretty reasonable. This is a full PCIe class NIC (so no huge CPU hit like a USB based one). What is unknown is if it supports jumbo frames, and sadly you still can't be sure these days, considering our 2011 Dell workstations still lack this feature. In any case, NewEgg is showing gigabit PCIe cards at the low end of $14. Any reputable one I'd want to put in my machine is at least $25.