D library projects

[BLS]

On 12/11/2009 19:59, Walter Bright wrote:
> For anyone looking for an easy, but valuable, contribution to D, take a
> look at the go runtime library.
>
> There's a lot in there we could use in the D library:
>
> http://golang.org/pkg/
>
> The library is licensed under the
> http://creativecommons.org/licenses/by/3.0/
> meaning we can adapt it to D.
>
> Some packages that look particularly useful are:
>
> archive.tar
> compress.flate
> crypto
> debug
> ebnf
> encoding
> gob
> http
> image
> net
> rpc

erm.
may I ask why std.json (generously offered) did not make it into phobos 
? Seems to be a bit too difficult to contribute. No ?