Which firmware for Asus RT-N66U?

Hi,

I've been using v1.28.0502 MIPSR2Toastman-RT-N K26 USB VLAN-Ext on an Asus RT-N66U for 18 months or so, but was wondering if there is a newer / fresher version which features that I'm missing out on.

What version firmware are people using for their N66Us?

Thanks

Will