And here's a [url=http://tomreyn.megaglest.org/unreleased/annex_r4314_linux_64.tar.xz]compatible test package for Linux x86_64 (amd64)[/url]
(105MB).
Use tar xJf annex_r4314_linux_64.tar.xz to unpack it, then change into the extracted annex_r4314_linux_64 directory and run ./annex,