Arthur had a very good game and I think he's probably a late lottery pick. I'd have no problem if we draft him, provided Love and DJ Augustin are gone.
But I hate to be the spoiler... again

, but Arthur didn't guard Josey Dorsey, that was, again, Darnell Jackson's job to guard the other team's best big. Arthur guarded Dozier, a 215 pound beanpole that plays on the perimeter. But Dozier still had 10 rebounds (season average 6.8), including a key offensive rebound near the end of regulation off of a missed FT by simply overpowering Arthur. Memphis scored and if it weren't for Chalmer's shot, Arthur's inability to grab boards would have costed his team the final.
Arthur is not a good post defender, if he is, it wouldn't have been Darnell Jackson taking on the best big guys. In the NBA, he's going to get overpowered by almost every PF not named Hakim Warrick. I don't see him as a good fit for Hawes, Hawes needs a big who can grab 10+ boards and guard the other team's best post player; defensively, Arthur is basically a shorter Miki Moore with better shot blocking.
But at #12, I don't mind taking a chance on him. He's not the solution but he may be a key piece nonetheless.
Besides, if we can't have the NBA's best team, maybe we can have the NBA's most "Anorexic Team":
PG Douby
SG Martin
SF Garcia
PF Arthur
C Moore
Collectively, that lineup weights almost as much as Nicole Richie.