Rafe Needleman: “Eventually the battle for Wi-Fi users will likely be fought between cellular carriers and wired network access providers (dial-up, DSL, and cable).” Not so fast. The cellular operators are waking up to the potential of WiFi, but they will come up short when they realize how much it wrecks their 3G spreadsheets. And the wireline carriers aren’t even thinking about the WiFi hotspot business. So who else is going to win in this market? I’m not sure.