The EliteConnect series of access points have premium features for $300 to $350: SMC has adopted a number of typically enterprise-only offerings in its new mid-range priced devices. This includes the incredibly useful virtual SSID option, which allows multiple virtual networks to appear available with a single access point controlling access. Couple that with individual security settings for each virtual SSID and a VLAN--a separately partitioned logical data channel that keeps traffic private within the device and over an Ethernet network--and a small business could have top-level security for its own network and open access for guests.
The routers also include QoS (quality of service) prioritization, SNMPv3 reporting, and WPA2. A b/g router is $300 list and a/b/g just $350. The devices also support 802.3af for Power over Ethernet (PoE). They can be configured via a command-line interface, a Web browser, or a management tool from SMC. The units ship in April.
Prior to this product line, I've only seen some of these features in the Gateway Computers 7000 series of APs, which were announced and buried, though still sold.