Another thing to be aware of...
When bonding together multiple connections, you do get more bandwidth, but maybe not how you might think. If you have four 1Gbit connections bonded together, then 4Gbit of bandwidth is available, but it's split up into four 1Gbit streams, and a user can only access one stream. So if there's a single user, it'll feel like 1Gbit to him. But if there are four users, each of them will use a 1Gbit connection (so long as the networking automatically spreads out the load properly).
This becomes even more important to know when designing iSCSI storage. Ten 1Gbit connections bonded together will not give you the same thing as a single 10Gbit Ethernet connection. It's ten 1GB streams vs. one 10Gbit stream.
Ray