Tenser's Floating Disk
So, you can now sit on it yourself (it carrys anything you put on it), and moves your base speed as a move action. Any reason why you can't use this to move over traps? Pools of acid or lava? It normally floats a foot off the ground, but it can also keep up with you wherever you go (so if you were flying, presumably it would float well above that 1 foot level from the ground), which may mean it is capable of flying if you direct it to with a move action.
It's also a force object, which I think means it can block a doorway.
If you are an elf (speed 7) with the +5' speed feat, and you run (+2 speed) you could be moving the slower character in your party behind you at a speed of 10.