Oh cool! I haven't used my R4 for quite a while, but I really like the WiFi update function. Very nice! My old original R4 has the busted spring issue with the SD, so I have to tape it in place. Updating without having to remove the SD is very convenient.
Hope you'll be able to get that Captain America game going soon. All I have is an original R4 and a CycloDS and TC apparently has gone lame.