iPhone and iPod Linux Support | Does my iPhone or iPod work in Linux? Yes! Check out the libmobiledevice project. These guys are awesome. You can sync your music, backup your entire phone / device, and even do tethering. It just shows up as a network device in Linux. A few blurbs about it are here, here, and here. iOS 4
Encrypted VPN with DD-WRT for your iPod or iPhone | How do I create an encrypted VPN to tunnel my iPhone traffic through my home internet connection? August 2012 Update: PPTP VPNs are no longer secure. The encryption has been cracked and PPTP VPNs should no longer be used!