The mini charges via USB, and Apple released USB chargers... however, if you own a 3G iPod, you are better off getting a FireWire Dock connector wire for the mini as it will charge via firewire as well, as the 3G can not charge via USB.
As for protecting it, they sell great iSkins for the minis... my friends with minis dont protect them, only one of their screens cracked every one elses was fine...