Good advice, but to expound, if you have a hub or switching hub (often just called a switch) that will support both 10 Mbps and 100Mbps, then the NIC on your computer need not support 10Mbps, since the hub will handle that difference. On the other hand, some folks have reported odd problems with (usually cheaper) hubs not passing data properly to (from?) the empeg. On that front, I'd personally suggest Netgear. They seem to be both fairly inexpensive and quality.
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Bitt Faulk