I plan on purchasing the FlashCard Iedge for the DSIXL that comes out tomorrow and I'm curious to know if it will work with it properly. Also, if anyone owns the Iedge I'm curious to know your opinion on it, and if there's a better option for me. Thanks in advance Edit: It seems after using the trusty search tool I found my answer, however I still want an opinion on if the card is worth it, I found one for $28 without the mem card.
Apparently any flash card that works on DSi 1.4E firmware will work on the DSiXL. I don't own Iedge but i did some research and got a acekard 2i (also DSi/DSiXL compatible) for me it seemed better in every aspect price (mine was $22 at the time - no memory), compatibility (play every rom currently available) , support (you tell the problem they fix it, compile the new firmware - no quick fix - and release it after being completely sure it is good).