Unfortunately, no updated driver is planned for Windows 7 or Server 2008 R2 for that adapter. The only way you can team the NIC using our Windows Server 2008 R2 software is by adding the ports to a team you create using one of the newer PCI-Express NICs. If you have an available PCI-Express slot, you could add in a newer adapter and then create a team using ports from both of those adapters.
Although it is not supported, some users have reported success by installing the Windows Vista software by doing a manual driver install. I recall seeing seeing something on the work around using Vista drivers posted elsewhere in the Intel communities.