I already got my R4 through gameyeeeah, but I found some R4s for sale when I was shopping in Nagoya this weekend. In Osu, they had R4s in stock, as well as a selection of micro SD cards. About 2,000 yen for 2GB cards, I think. I'm assuming there must be stores that have it in Akiba, but I haven't been to Tokyo for a while. Lastly, anyone know where I can get a Slim PS2 modded? I don't feel like destroying it myself.