Why would anyone want Bluetooth on their iPod? For WHAT? To transfer data across 2 feet when the cable is lying right there?
The point of bluetooth is a unified generic technology that makes sense for a computer to communicate with devices like mobile phones, that are made by several manufacturers and have different cables. Bluetooth solves this.
iPods work with any computer, and they all have the same cable that comes with the iPod and it works with iTunes which is free. If I would connect my phone with a cable to a pc then I would need drivers. Bluetooth solves this for me.
But iPods can't really benefit from bluetooth, which is essentially a technology invented to ease compatibility issues.
iPods with WiFi would bring options like music sharing and buying songs off iTunes at any hotspot, so WiFi MIGHT be an option, but is also a bit overboard considering wha the iPod is: a simple product that carries your media. It's already very featured for my taste, I don't think I'll need photos or an FM Radio on my iPod.