The latest "Mango" update to the Windows Phone platform appears to belatedly support using your phone as a modem (tethering) and using it as a mobile hotspot. A screenshot over at WP Central shows an official instantiation of Internet Sharing on a Samsung Focus running Mango. As with most mobile hotspot features, the update appears to support sharing your 3G connection with up to five Wi-Fi enabled devices. Unfortunately, as with other products, you'll only "officially" be able to use this feature if your wireless carrier says it's ok. Neither AT&T or Verizon like users to tether unofficially, because they're eager to charge you an additional monthly tethering fee for doing absolutely nothing. AT&T has recently been sending warnings to users to root/jailbreak phones and tether unofficially, telling them they'll be automatically upgraded to more expensive plans if they continue their deviant ways.