Nokia Lumia handsets are all set sport WiFi tethering with an imminent update, according to a report by Plaffo. We previously touched on the lack of tethering support found with the Lumia 710 and 800, and an FAQ article for the Lumia 900 stated the two handsets should be receiving an update in the near future to activate said feature.
The Lumia 610 and 900 both reportedly support Internet sharing out the box, which was introduced in the Windows Phone "Mango" update. Should Plaffo's source for this news, who's employed by Three in Italy, hold out we should see Nokia work with carriers to push out a firmware update that will address the issue of not being able to create a hotspot with a Lumia handset.
We do not expect to see tethering enabled in any of the current firmware released, which all sport battery improvements. This is due to Nokia ensuring carriers continue to roll out new versions with important stability fixes and do not skip an update to avoid tethering.