I was playing around, I mean doing important work, and found out you don't need to use a browser or an FTP client to move files on and off the iPhone.
This is for Mac OS X Leopard (10.5).
Press command-K from the finder to bring up the
Connect to Server command.
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Enter the afp address listed at the bottom of the DataCase screen. Then connect. You should click on guest at the next dialog box.
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You will then be looking at a list of servers (folders) to mount on desktop.
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Select the folder you want and then accept the connection on the iPhone.
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Then you will have a new shared volume on the computer and you can upload, download or browse the files just like any hard drive.