I found one of my favorite spiders today, the Fishing spider (Dolomedes tenebrosus).
Whenever someone comes to me, holds their hands 6" apart, and proclaims "the spider was THIS BIG!" I know that it was a fishing spider, and that their memory was a bit exaggerated. Their maximum legspan is about 3", which is still impressive for a spider in the Northeast US.
They are not dangerous, as evidenced below. Though perhaps it's only by luck that I play with so many spiders and have not yet been bitten. I think this species is particularly beautiful.
This is what I'm sure will freak some people out... I was letting her crawl all over me, and got a short video clip of her running up my arm. Those toes tickle!