Intel Pro/1000 Pt Dual Port Server Adapter - Network Adapter - Pci Express X4 - Gigabit Ethernet X 2 Conserve Valuable Pci Express (Pcie) Server Slots While Adding Multi-Port Gigabit Ethernet Capability With The Intel Pro/1000 Pt Dual Port Server Adap
Pros: This is an awesome server card. I'm running it on a server 2008 R2 DC/file server and I can download from it at a sustained 90MB/s and not notice any network slowdown (in the form of DNS requests) from other stations. Also, the CPU usage is minimal when transferring data at those speeds.
Cons: A little pricey, but it's A) Intel and B) has the word "server" in its title. If you want fast, use the MB's built in port(s). If you want screaming fast, get this.
Overall Review: I'm going to get another one for the other server I'm running. I haven't been able to enable teaming on the card yet, but I'm going to tackle that soon and maybe I'll report back after :)