> > Will this also support:
> > tar xvf something.tar
>
> Personally, I wouldn't worry about supporting this format.  tar is
> about the only program in the universe that uses it.

Tar may not be the best example, but the concept of concatenating boolean command flags togather as a single argument is very common. As an example, every command line compiler I've ever encountered allows it. Perhaps I should have written my tar example as:

tar -xvf something.tar