For those that like their Archos at arm's reach we offer our vent mount cradle kit. Best of all, our Archos vent mount and cradle is the least expensive of our mounts!
The cradle fits very tightly around the Archos and has a quick release button for when you want to move it inside. In addition to using this for the Archos, you can use it for an iPod or many models of satellite radio.
Take a look at the pictures. Another cool feature of this is the mount itself actually swivels so if for whatever reason, you want this sideways, well, you can do it.