Here's RC1 for linux for testing: (link removed, see below) It contains both 32-bit and 64-bit binaries. Recent changes: build-unix.txt: - Added instructions for building wxBase, which is needed to compile bitcoind. - The package libboost-dev doesn't install anything anymore, you need to get libboost-all-dev. - Updated version numbers. makefile.unix: - The libboost libraries have removed the "-mt" from their filenames in 1.40. If you're compiling with Boost 1.38 or lower, like on Ubuntu Karmic, you would need to change it back to boost_system-mt and boost_filesystem-mt.