At last I got one today.
But I'm a total idiot, and I turned-on the DS before charging it.
Would it ruin by anyway my DS, or it doesn't really matter?

And a Wi-Fi question:
How does it work really?
I'm thinking about to go buy a Nintendo Wi-Fi USB Connector, but I really have no idea how it works.

So a good explanation about it will be very nice.
Thank you.