My iPad 3 would not support SDXC or USB drives, do the new iPads support these through the new lightning adapters?

None of us know for sure and probably can't find out until ipad4's start showing up and are able to be experimented with.

I personally could see the SDXC maybe happening, but not the USB.

Per Using the iPad Camera Connection Kit

http://support.apple.com/kb/HT4101

Here are the supported SD cards and image-transfer protocols:

• Picture Transfer Protocol (PTP)

• Mass Storage Device protocol

• SDSC

• SDHC

• miniSD

• microSD

• MMC

• SDXC (supported only when not formatted as ExFAT)

 Cheers, 😉

Yes - the 'old' Camera Connection Kit... But we're curious about the new Lightning - SD adapter. Impatiently awaiting similar article about the new product since the details on the store are limited.