We've gotten it up to 106.25 MPH, or 935 feet in one round (see posts 7 and 8.) I can't say how much this delights me.
The fact that this monk can come at you at the speed of a MLB fastball is a glorious image.
The real question is... Only using up to 20th level and the core books, can 2e, 3e or 4e produce a faster character?