I just got my DSi yesterday, and still waiting for TTDSi to get here. My question is has anyone tried to TTDSi after updating the US DSi? Right now, I don't any games on my DSi, so I thought it might be nice to download some free games from the DS Shop. However, it requires firmware update, so I am afraid that after I updated my DSi then my TTDSi won't work. Thanks for anyone who have tried it.