ohhh yes sir. a look through
www.conklinguitars.com should give you an idea. personally i would never use any bass with more than 6 strings, but one of my inspirations to start playing bass was a local guy who RIPPED on a 7 string. it was tuned like so, if my memory serves me correctly
G (freakin' LOOOOW)
C
F
A#
D#
G#
C#
so that's a half step up on every string from standard tuning, mainly to match the guitars which were tuned to dropped C. he used that low G very sparingly though...trust me the thing kills.
PS. what in the world is that beautiful bass in your signature link????