At ~$22/port... These Look like a great deal...
http://www.fujitsu.com/us/Images/xg2000-datasheet.pdf
Fujitsu EMC 10GB Ethernet Network Switch XG2000R PD XG2040FC 100 562 772 | eBay
Fujitsu XG2000R 20 Port 10GbE XFP Switch PD XG2040FC | eBay
http://www.fujitsu.com/us/Images/xg2000-datasheet.pdf
Fujitsu EMC 10GB Ethernet Network Switch XG2000R PD XG2040FC 100 562 772 | eBay
Fujitsu XG2000R 20 Port 10GbE XFP Switch PD XG2040FC | eBay