Nokia N80

I am about to purchase a new cellphone..i just saw that Nokia is coming out with the N75 which will be compatible w/3G in the USA..nice but no wifi-if someone owns this phone..how does the VOIP work? does one call any number when connected to a wifi? does it work thru skype? nobody at nokia seems able/willing to answer these questions..other than the voip calling I don't see an advantage to wifi if you can already connect w/3G or EDGE..any opinions?