Interesting device, and level of Android support is unbelievably good.
However some parts of system are more on late alpha level than early beta yet. I'm thus forced for now do enterprise things like Lync, Exchange and sip with Android apps.
Totally refuses to connect to TKIP-based WiFi network.
Adding Exchange account results in shaky e-mail sync, random (and multiple-duplicated events while many missing) calendar sync and totally missing contacts sync, probably due to incapability to enforce the phone lock policy requested from Exchange server.
Let's see what the next firmware update bring/fix.