I had a USB to ethernet adapter, plugged it in, restarted my Mac Pro, let it configure itself, and I now have my 2+ mb internet connection. Before I was lucky to get 2kb. For whatever the reason, the built-in ethernet connects at 10baseT, oit gigabit. From all I have looked at, this seems to be a problem with the 10.6.6 or 10.6.7 update and some machines. For me it has only been on my Mac Pro, not the iMac, and not either of the 2010 Mini's. 4-17-2011 9AM For whatever the reason, at least two drives are now working. I used CCC to copy from HD4 to HD 5, vs the other way around. Took a long time. But I now have built-in ethernet working. Weird observation - in preferences, network, ethernet it says I'm on 100baseT and it's grayed out.