My advice would be for the Senate to appoint a clerk, much like the real Congress has. (Watch C-SPAN if you don't know what I am talking about.) The clerk would be responsible for maintaining the notice board.
I would also recommend Bono and Demo Hawk for the position, depending on who is not serving as it seems they will be splitting the term.
This is actually an excellent idea.
The choice for the Senate is whether the clerk should be a Senator or someone outside the Senate. Both have their positives and negatives.
And also, the Senate Notice Board (which is something created by Emsworth entirely) should probably be codified in the OSPR as well.