The eglibc side of this bug is fixed (or should be - the package just finished building on the buildds and looks correct, now it's a matter of testing that it all works together). To fix it in the EC2 images, the build will need to be updated to pull in both libc6-i686 and libc6-xen by default; I don't know where this is done, it doesn't appear to be part of the Ubuntu package seeds.
The eglibc side of this bug is fixed (or should be - the package just finished building on the buildds and looks correct, now it's a matter of testing that it all works together). To fix it in the EC2 images, the build will need to be updated to pull in both libc6-i686 and libc6-xen by default; I don't know where this is done, it doesn't appear to be part of the Ubuntu package seeds.