I had a D70s for about a year, pretty good camera overall. Probably would go for a D80 if you can though because it would be a better overall purchase. Only thing that would really like to improve on the D70 is it's ISO performance, get quite a lot of noise from 400 upwards relative to newer models (including the D50).
Mine was savaged by a waterfall in Thailand unfortunately, metal lens mount ripped off camera due to heavy-ish lens + slight fall via neck strap. Due to the plastic mount issue's I bought myself a D200 due to all metal construction. I've heard of people dropping the D70 from great heights and surviving no problem though.