Theo has just released version 5.8.0 of the Sonoff-TASMOTA package into the wild, with a fairly varied collection of additions, updates and fixes.
There are several changes related to WS2812 LED control, a fix for a watchdog timeout problem, as well as other fixes for MQTT, language support and Domoticz and addition of support for the Yunshan Wifi Relay and Witty Cloud. The complete changelog is available here:- https://github.com/arendst/Sonoff-Tasmota/blob/master/sonoff/_releasenotes.ino.
Owen Duffy has a nice rundown on the pros and cons of the Yunshan WiFi Relay board on his blog (and it’s worth taking a look at some of his other ESP stuff, too).
esp8266hints 