After accidentally installing the 1.90 cabled firmware on my Wireless Envoy (which the Wireless Envoy WILL load.... you just won't get any external readings). I quickly downloaded the 1.90 wireless firmware, not realizing that Davis had since pulled it from their site.
The 1.90 firmware was pretty buggy. Any request for weather data would cause the Envoy to time out. Also, no data was being sent to weatherlink.com.
I re-downloaded the 1.82 wireless firmware to my envoy and all was good again.
So yeah I'd wait until Davis puts an updated firmware on their site.