According to The Verge, Microsoft is already working hard on an update to Windows Phone 8 called Apollo. Think of it as Mango for WP8. The rumored update is to include VPN support, which will surely be widely received by enterprise, always on WiFi fix, some sort of audio improvements and various other bug fixes. The best part about the update, it will be pushed over the air! Long live OTA!
Still no official word from Microsoft, but most are expecting them to detail the updates at Mobile World Congress this coming February. Lets hope this update arrives sooner than later, everyone loves an update!