Yeah, I decided to make it case insensitive to avoid confusion. It seems most non-techies aren't aware of the GB vs gb distinction (and not to mention the uber-geeks who insist on gibi and kibi and all that :) )

If you want gigabits, you can explicitly write "gbit":

http://instacalc.com/?d=&c=MSBnYiBpbiBtYml0fDEgZ2IgaW4gb...

Thanks again for all the feedback guys!