I wonder if this would work with PF_RING[1] from the ntop guys? Regular libpcap drops packets quite a bit at 10G+ speeds when you have adaptive coalescing disabled on the network card.
PF_RING is an option but it requires a kernel module and specific network cards. Before then, the memory map sniffing feature of the Linux kernel [1] can improve libpcap performance. Not quite to 10G speeds, though, but I think enough for most cases :-)
Any plans to support it? Part of my job (historically) has been building line rate pcap appliances that do pcaps at nanosecond resolution (using endace cards, Mellanox, or solarflare). PF_RING is a bit tricky to get working, but is completely flawless when you get it running.
[1] http://www.ntop.org/products/pf_ring/