Be sure to mount it read-only if you are uncomfortable with it, then it cannot destroy any data. Also, you will not have any luck unless you have enabled Amiga partition support as well.
*edit* I got beaten to the punch, sorry for the redundant info on partitions!
Things in Linux seem to remain marked "experimental" for a long time unless they get extensive testing. Things like Amiga FFS support are not going to get the same kind of attention unfortunately. I have never had problem with experimental stuff in release kernels, but I have never tried the FFS so YMMV.
