Joikuspot converts your cellphone into a Wifi hotspot. It shares your 3G internet connection via Wifi.
I tried it last week during my vacation in Davao and it works like a charm. Using the Smart Buddy Unli Surf plan, me and my wife can surf the internet at the same time using our laptops by connecting to the Wifi hotspot from my cellphone.
Watch the Youtube demonstration from the Nokia blog: