You might be interested in our ongoing work to execute Linux binaries in a SmartOS zone.[1] It's still an area of very active development (one needs to unfortunately follow the source[2] to follow its progress), but we have a ton working -- and it's all being done in the open. (And it's certainly very nice to be able to "apt-get install" something and then be able to DTrace the resulting application!) We're close to having enough working to be able to document where we are and get others kicking the tires, so stay tuned to the SmartOS discussion list if this is something you're interested in!
[1] https://www.mail-archive.com/smartos-discuss@lists.smartos.o...
[2] https://github.com/joyent/illumos-joyent