Feelings on both sides of the 'trade Billy Walker for cash' issue have been expressed on this site. My initial reaction on draft night was disappointment. Since, I've become neutral to the scenario, figuring that Walker would not have made the team in the first place.
Head over to the Hoops World Blog to check out a YouTube of Walker recently mixing it up with the Houston Rockets. Now, the action in the clip might not sway you to the 'good trade' side of the argument....however, take note that the Celtics announcers recount that Tommy Heinsohn calls Walker the most combative Celtic and say that he's already picked a fight with Kevin Garnett in practice.
Knowing what we know about the Wizards and the dynamic of the team, I would suggest that we don't want a "personality" like Walker in the locker room.
On another note, how 'bout that Ron Artest?