Nokia has released an updated to the Lumia 710 and 800 that will enable features such as Wi-Fi hotspot and flip to silence. At Nokias website you can check out specifics about the update and when it will hit your specific device.
Internet Sharing (Wi-Fi Hotspot)
Share your mobile internet connection over Wi-Fi with up to five client devices or computers.*
Flip to silence
Silence incoming calls by flipping your phone face down.
After updating, your Nokia Lumia 800 or Nokia Lumia 710 will be ready to install exclusive new applications available in the Windows Phone Marketplace (Camera Extras, Counters, Contact share, PlayTo and more).
Check out it here.