Well, his contract doesn't have any impact on draft choices, because those are rookie scale contracts, and it doesn't have any impact on trades, because the salaries have to match up, so it all depends on what kinds of free agents are available the next couple of years...
I am a fan of Arenas, and these kinds of things are why, plus he is freakin' awesome. I hope his play won't suffer from his injury.
Nice to see that not all players are just about the $$$. Definitely a class act move. I hope it works out for him.