Trancend 4GB SD card arrived Friday. As reported by others my R-09 recognized the card and showed available recording time of 3 hours 50-some minutes when set to 24/48 (though it reported the card size as -512MB or something, I can't remember exactly). I could format the card using both a built-in card reader in a cheapo $500 Compaq laptop (XP Home) and a $9 thumb-drive type card reader (XP Pro). I recorded about 500MB worth in 5 files, which played back fine. I could delete files from the card using the R-09 menu.
I then attempted to format the card on the R-09 and as reported it became unreadable by the R-09. Tried to format on the laptop but it would not recognize the card either. Brought the card into work this morning and my work machine (Dell - XP Pro + $9 keychain USB flashdrive type reader) could read the card and the 5 files were still intact. Transfered the 500MB to the desktop in about 8 or 9 min. & formated (FAT32 - 3.85GB took about 1 min.) I'll try the card again in the R-09 again tonight when I get home.
I had thought I would need to download the utility mentioned to recognize the card again and format here at work (no online service at home currently) but was happily suprised that this machine recognized the card. Since I plan on using the laptop to off-load from the card in the field, I'll just have to make sure I don't try and format the card from the recorder until a firmware update that addresses this 4GB issue. I also plan on downloading the utiliy to see if it works to recover the card using the laptop. That'll be the next test..
(edited for typo's)