9P is the responsible for providing Plan 9 with a uniform way for 
accessing resources as files. 
It's the responsible for the transparently distributed aspects of Plan 9 
and other stuff as filesystems being implemented as normal userland 
programs.
Adding 9P to OpenBSD will simplify and speedify the tasks of writing
and supporting filesystems and provide a simpler way of sharing and
presenting resources in a single computer or network.
As a positive consequence of this addition, a simple and clean 
filesystem for using in a networked environment could be used in 
opposition to the big and complicated NFS.
The project would be divided in three areas:
1) Implement the filesystem itself. It should be compatible with the 
Plan 9 9P2000 implementation.
2) Implement the UNIX extensions known as 9P2000.u.
3) As means for quality testing, explore the consequences of the 
implementation (NFS substitution, implementing 
file{systems,servers} in userland).