I personally feel the ony route for P2P is telkom at the moment, until neotel steps up to the plate and provides their fibre connections.
As far as ration 1:1 is a good place to start 2:1 is preffered as at least than the community can see you giving back.
+1 on all counts.
The 2:1 is just very hard to get with a small line... I have to plant seeds for the rest of the month (with no reaping at all) to get anywhere above 1:1.