[boost] Support for reading/writing binary 'streams' (asio?)

Hi, When reading/writing binary streams, you often need to read/write an (unaligned) integer in big, little or native endian. Is there support for this in Boost? I think iostreams isn't usable as 'zero-copy' is required. What do other Boost developers/users use/recommend? Wouldn't this make a nice additional to the new asio library? Olaf