When it comes to re-imagining superheroes there's two things that I think should never be changed. Sexuality and gender. Like, how the new Batgirl is a lesbian. What? Why would you make her a lesbian? Did Batman go around boning girls all the time? Did Batgirl go around boning men? Why does her sexual preferences suddenly need to be addressed? It was a non-issue before and the kids aren't going to care what Batgirl does in her off time until puberty, and even then, there's an internet for that.
So yeah. Those are the two things that I think should never be changed. But skin color? It's not integral to who Spiderman is, so I think that that's fine, but I don't think it should be a big deal. I totally agree with what Duke said. Make the casting open to everyone, if you want to be diverse or make a statement about being diverse. This smacks of "Oh man but black people are awesome, you're so racist how come we can't have a black Spiderman let's cast a black Spiderman to show how wrong you are racist!" If he's good, cast him. If he's not, don't. Don't just cast a black person because they're a black person. That's stupid reasoning.
But yeah, I'd be cool if this guy got in provided he's a good actor. Plus, no matter how silly you think he might look, nothing can beat the stupidity of some of Toby's expressions.