Iomega SuperHero
via Wired
The Iomega SuperHero features standard dock for charging and backup to an SD card.
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Buffalo Dualie
The Buffalo Dualie is a combination hard drive and iPod/iPhone dock. It comes bundled with a 500GB HDD.
Source: Engadget
Kensington K33457US
The Kensington Charging Dock with Mini Battery Pack offers iPhone and iPod charging as well as a battery pack for extended use. The unit also features a removable cable for charging and syncing.
Source: CrunchGear