Hm. I understand what you mean now. Worth testing when a new firmware comes out.
Also, the store opens April 5 in the US. Today was the official launch in Australia.
You can't get the DSi browser without going to the shop, so that's a moot point. I suspect you could go online with an (old) DS game, though, but probably not a new DSi game.
Doesn't matter anyway, I update and the Acekard 2i works fine.
Just to toss this in, just got my Acekard 2i to go with my DSi I picked up this morning in Sydney, Australia. Flashed to latest firmware, standard Acekard 2 firmware and works just fine. Party!