Looks like Asus released a new firmware version today:
http://usa.asus.com/Networks/Wireless_Routers/RTN56U/#download
ASUS RT-N56U Firmware Version 3.0.0.4.360
1. AiCloud
For iOS user, please upgrade app to 1.02.78 or above
(for more information, please refer to
http://event.asus.com/2012/nw/aicloud/index.htm)
2. Network tools in Advanced setting
3. WOL user interface
4. H.323 and SIP passthrough can be disabled in Advanced Settings --> WAN -->NAT Passthrough
5. Click the device name and lookup the manufacturer information
6. Change the DHCP query frequency in Advanced settings-->WAN-->Internet connection to resolve the ISP compatibility issue.
Fix
1. Wireless time control related bugs.
2. Media server related issues when lan subnet change or USB hotplug
3. IPv6 over PPPoE interoperability issues.
4. PPPoE password setting error in Advanced wan setting.
Modify
1. Support Huawai E353 3G/4G USB dongle.
2. The router setting URL is changed to
http://router.asus.com, use the original URL
http://www.asusnetwork.net can also go to the setting page.