I'll have to look through some of my late 2000 catalogs but something is surely amiss here.
To my knowledge Bianchi never used a SLX Bianchi decal I am not even sure the SBX decals said Bianchi. The decal style looks wrong for a tigged frame, not to mention the orientation of the seattube decal. I think the straight blade fork is not a Bianchi thing.
I believe most of Bianchi later Pistas say late '90s when a "fixie" became hip were track geomentry but drilled for brakes. The internal cable is another matter.
Any pics of the dropouts?
__________________
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk