Remounting storage devices

[Gregory Weston]

I've been looking through the docs, list archives and Google today  
without luck. I'm sure this means I'm not searching for the right terms.

Let's say I plug a USB thumb drive into my machine and wait for it to  
mount and show up in Finder.
Now a I select it and choose Eject from the File menu. It disappears.

How do I get it back?

I can still find it in the IO registry as a block storage device, but  
not as media (which makes sense) but is there any way for a program  
that I launch after ejecting the drive but before unplugging it to  
tell the OS to mount the volume(s) on it?