Sounds like the R4 has it's days numbered!  I'm sold on the small but useful features - changing brightness and having a clock display.  The HD card support is an added boon.  Do you think there'll be any chance of you trying it out with a high capacity SD card and updating the review?  I'm just curious about stability and access times.  I know that most slot 1 cards already have access time issues with larger capacity standard density cards...