[mikewest]

For more clarification, you say that all programs on the SD card are not accessible, does this mean you used an app of some sort to move the apps to your SD card. (like Titanium Backup or App2SD?) If you did, did you recently update these apps? If not, check to see if there is an update. If you did, try to rollback to an older version that worked.

If you use an app like RootExplorer, or Astro, can you see/access/modify the contents of the SD card that contain the data that you are unable to access? If so, try moving one of these apps to your root/data/app/ directory and see if you can then access it.

Did you try to run a Disk Check and Repair via windows??

Did you try to fix permissions in RomManager or Fix UID in AmonRA?

Did you try another MicroSD card to see if you have the same issue?

Did you try doing s factory reset? Did you install any programs that make any unusual use of the SD Card or USB port? (Any Wifi Mounting programs, any syncing software, or anything that combines data transfer from the phone to the computer via any method?)

Did you try to copy all files from the SD card to an empty folder on your PC, re-format the SD card as FAT32, then look at the items in your folder and copy them back on to the SD Card. (When looking at the items, you may determine that some of them do not need to go back, like old roms, etc..) Also keep in mind, that this is a nice time to ensure that any critical files are backed up.

Did you