While snakewood could be used for the fingerboard and tailpiece, the main consideration would be that a board large enough to make those would wind up costing more than a nice carved bass. It is VERY expensive and generally only comes in small sizes.
Vegasman, that is a confusing post. You like African Blackwood better than ebony and ebony better than most other rosewoods, but then the rosewoods and African blackwood, Dalbergia Melanoxylon, which is actually a true rosewood, are better....
African Blackwood is also a nightmare to use because of the high oil content. It will gum up any of the power sanding tools in the first pass- thickness sander, spindles, discs- worse than Brazilian Rosewood. I figure about $50 extra worth of sandpaper just for a little mandolin build.
I know a number of builders, myself included, who have developed allergic sensitivities from using African Blackwood over the years and can no longer use it. I've always wanted to try it for a bass fingerboard and tailpiece but had visons of poison ivy / oak like reactions every time I played the bass.