At no point will we ever link with other networks. The reason for this is simple: There are too many issues caused.
In every case where we have ever tried linking with another network, there has been an argument, or disagreement of some kind.
So to keep it simple, the answer to any link requests will be a simple no.
We are linked with one other server currently, but this is a server that is rarely used, and the owner of it tends not to get involved at all.