I'm dealing with a 3.5 inch floppy drive and I'm curious if there's any way to get a USB drive's data directly into the place where the floppy drive would usually be inserted. Is there such a device?
There isn't a device which allows a 3.5" floppy drive to read off of Flash memory, simply because the drive itself works through the traditional mechanical means of its media. Such a device would be similar to a car tape-deck adapter for a CD player, and would be prone to failure anyway.
There are many, many devices like this one which will allow you to use USB disks with a 3.5" bay, however. They require connection to the USB headers on your motherboard or an expansion card purchased separately.