This Router

Newegg has the Belkin F5D8236-4 Wireless-N Router for $49 - coupon code “EMCMMNV58” (Expires 11/27) + $0 shipping = $35 shipped. dynamic IP address assignment, DHCP support, NAT support, auto-negotiation, and DoS attack prevention.

Product description from Newegg:

Model Brand BELKIN Model F5D8236-4 Spec Standards IEEE 802.3/3u, IEEE 802.11b/g, IEEE802.11n Draft 2 Security Wi-Fi Protected Setup; 256-bit WPA/WPA2 Personal; 64-bit,
128-bit WEP encryption WPA/WPA2 WPA2 Ports 4 x 10/100M Wireless Data Rates Up to 300Mbps Operating Range Up to 1200 feet Antenna External Antenna Interface Ethernet Port VPN support PPTP; IPSec pass-through Wireless Adapter included No Features Features 4 Ethernet Ports for Wired Connections
Supports Wi-Fi Protected Setup Push button for simple wireless security setup
Includes Personal Network Assistant software which makes it much easier to set up and troubleshoot your network Manufacturer Warranty Parts 1 year limited Labor 1 year limited

Product link.