The DockBoss+ from CableJive is a utility cord that plugs onto any iDevice-specific 30-pin connector and snakes away into two Android (or Blackberry) ready plugs: An audio jack for listening, and a mini USB for charging. The 2.5-foot cable will start shipping out on September 28th for $29.99.
Until recently, DIY was the only way to go for users who wanted to plug their Android phones into iPhone connections. If you're handy with a soldering iron and want to get hands-on, check out these step-by-step instructions to creating an iPhone-to-Android adapter. If you're handy with Polymorph, the mouldable material used to shape this dock adapter's casing, you can even create a polished cradle for your phone to sit in.