I ordered from jandaman, was pretty slow even though it was shipping from washington. Last thing I ordered was from mod-chip.com, it was shipped from austria and took the same ammount of time.
I use a EZ-Flash 4 with a R4. No trouble with either so far. The ezf4 plays GBA games great and the R4 plays NDS great. Both the ezf4 and the R4 use microSD. I have a 1gb card in each, havent tried swaping it.
I'm new, I came here for reviews. Newegg had a deal on 1gb microSD card for $17 2 days ago. Jumped at that. Now I had to decide between the R4 and the M3 simply. Went with the R4. Just ordered it. Cant wait.