A while back I seem to recall that some Wiis were not able to be modded. I'm thinking about getting a Wii now and was wondering if I need to find a used older model or if I can just get one new and be able to mod it.
Marcan and bushing spoke about that at the conference - I dont think we will see them on the shelves for a small while yet , but they are on the way - they can still be softmodded from what i can tell.
The new wiis that are out at retailers now have epoxy covering the drive chip legs. You can use a heat gun and a knife to remove it, but you won't be able to remove it to the extent that you can use a wii-clipped modchip.
Best bet is to get the d2sun, should be compatible with the latest drive chip (as long as you pry off some the epoxy)