Nowadays, for a mobile equipment, I find it more useful to have 3-3.5G connectivity than even wifi.
3/3.5G vs Wifi
- always available, for wifi you need to be close to a hotspot and you cannot move
- everyday new flat-rate operators are coming into the play, so it's not that expensive anymore
- 3.5G can be really fast at least fast for web/mail traffic you cannot tell the difference
- wifi: very unsecure, easily anyone can eavesdrop your network traffic, sites you visit, pop3 account info, ...
Of course I don't consider iPhone neither, for the same reasons.