writes "I am in quite a predicament. I decided a while back to branch out and use a new operating system (currently running Debian), after a bit of searching (trying Gentoo, Gobo and Arch along the way) I decided to use something that isn't Linux. Long story, short: I narrowed the choice down to OpenSolaris and FreeBSD but now I'm stuck. OpenSolaris is commercially backed by Sun, has nice enterprisey tools in the default install and best of all, a mature implementation of ZFS. FreeBSD is backed by a foundation, has a minimal default install and a rather new (but recently improved in the 8.0 release) implementation of ZFS, however it offers the Ports Collection (I quite like the performance boost from compiling from source, no matter how small it might be) and a bigger community than OpenSolaris. That is just a very minimal mention of the differences, I would be interested to see what the Slashdot community thinks of these two operating systems."