OK. Lets see if I have this right .....
You plug in (for example) a flash stick.
It takes (for example) the device node /dev/sdx
It has two partitions /dev/sdx1 and /devsdx2
You want to change the filesystem on partition /dev/sdx1 (not just refresh the filesystem by formatting it)
After it has been reformatted it must be ejected and reinserted, so the OS system sees there is a new filesystem on that partition, and not the filesystem that it had previously registered against /dev/sdx1.
So this 'mountbox' in some manner allows the OS to refresh its record so that the new filesystem is seen and thus there is no requirement to unplug and reinsert the device.
Do I have all that correct?
Sorry to be so pedantic, but I want to be sure I have a full grasp of this.
I found nothing so far to indicate that mountbox has any special features ......
Mountbox - Mount devices
Mountbox is a small GTK+ application to quickly mount media such as a USB drive, hard drive or cdrom. Mountbox can be launched from a terminal or via the Tools menu (System Tools). Simply specify the peripheral (Device) and the mount point, ie. the directory where you want to access the media in question. Typically a CD is mounted on /media/cdrom, a USB key on /media/flash and disk drives on the local machine on /mnt. Note the Handbook also contains more information.
I suggest you have a look at pmount and gnome-mount both of which are in the repository.
They appear to be as capable as mountbox ...... but I may have missed something.
There are GUI tools also ..... KDF for instance (kdeutils-kdf)