I promised a few people that I would do a fresh ZFS port to FUSE that could be merged into ZoL HEAD. While life has delayed that, I hope to make it a reality this year. It was intended to be a development aid, but I know that there are some internal politics in a few distributions about shipping out of tree kernel modules on install media. I am told that a FUSE port will alleviate the internal politics. I imagine Debian et al integration would improve once that is a reality. Conceptually, it should allow for users to make an easy switch to the kernel modules once the system is installed. Keep your eyes open for that later this year.