The bad news from WiFiRanger is that the 6.6.7 firmware full of lots of nifty new features is taking longer than they hoped to finish.
The good news - they have back-ported a lot of the most critical bug fixes to 6.6.5, and this update is being released to the general public today.
A lot of people have run into the bug that made it difficult to join campground WiFi networks that prompted for passwords - this will ease a lot of pain while waiting for 6.6.7 to come along.
Check the link here for the full release notes: http://wifiranger.com/support/help-desk?view=announce&announceid=2