This is kind of cool.  It is a modular connection kit that allows you to
mix and match USB ports, PS2 keyboard and mouse ports, ethernet, parallel,
serial, 56k modem, etc.  This starter kit comes with the main unit,
parallel, serial, 4-port usb, and the end cap.  It`s only $18.99 too. 
This makes a great tool for both desktops and laptops.  Xircom is a high
quality (name brand) manufacturer too.  Do a search for: X13-0006 P
to get it. 

TIGERDIRECT