Sounds like a somewhat dangerous utility - the reason you get the "can't be removed right now" message in the first place, is because some application is "using" the drive. Granted, most of the time it might just be a thread that has it's current working folder on the drive for some reason, which is pretty harmless, but other times you could risk filesystem corruption.
I wonder if such a "forcibly eject" application is actually any safer than simply unplugging the device?
I use NTFS and "optimize for speed" with my external drives, so I'm a bit paranoid about doing things the right way