You want to check out Brocade, Intel DPDK and 6wind. Brocades Vyatta router has DPDK support as has Juniper VMX.

http://www.slideshare.net/shemminger/dpdk-performance

We're doing 5Mpps (routed, net bridged) on a single core with a project we're calling netmap-fwd.

I'll blog about it on blog.pfsense.org in a few days when I return from Brazil.

I don't have any figures for you right now, but routing is certainly a different problem than what is described in this article as routed packets don't need to be passed to userspace for any processing.

Makes a huge difference for performance!

depends on the commodity NIC. but yes, an E5 with an Intel 10G card can almost do 14Mpps "out of the box"