This better NOT come out until at least late 2012.
The DS is by far the most fun I've ever had out of any handheld system. Ever.
The sales on it are doing fantastic, I got the DSi a few months back and was worth every penny. I love the apps I can use with my DS now and how I can take out my DS games without turning it off.
The DS is still not out of date and there is no need to replace it yet.