Hi,
At the last release meeting, the switch to ext4 by default has been mentioned. My understanding is that we reach an agreement on the switch to ext4 [1] but it still not clear if it will happen this month.
To make it happen, it will require several bug fixes: https://bugs.launchpad.net/ubuntu/+source/linux-linaro-omap/+bug/817148 https://bugs.launchpad.net/linaro-image-tools/+bug/821479 https://bugs.launchpad.net/linaro-ubuntu/+bug/822593 https://bugs.launchpad.net/linux-linaro/+bug/824545
Also, it's worth mentioning that changing the default will break previous releases if they don't have ext4 support. The workaround is linaro-media-create --rootfs option to specify the filesystem.
If there's any blockers for Linaro 11.08 time frame, let me know.
Cheers,