I bought a second Ackard 2i for my nephew's birthday from realhotstuff.com. I know that there are other places to buy a Acekard that are cheaper but I usually go for price as well as customer service. I have to tell you I am very, very impressed with realhotstuff.com. Not only was their shipping fast but when the Acekard arrived it did not work. I tried all the MicroSD cards that work in my Acekard 2i on my own DSi and I could not get the unit to work. I called Realhotstuuf.com and they were very apologetic and shipped me out a new one that day with a pre-paid envelope to return the defective one. Most of the time I see people bashing companies about late deliveries or wrong orders or other complaints. So I figured it is only proper to give credit where credit it do. This is a top notch outfit.
http://www.realhotstuff.com/-c-74_102.html
http://www.realhotstuff.com/-c-74_102.html