I think a 2nd TF2 server may dilute the popularity/impact/appreciation of the 1st one. Remember the old days of the haven ns server, when it was so popular you had to queue to join, I feel it just made you feel all the more happy when you did get on.
Earlier on the week we had around 16 or so players at an organised TF2 event, last night we managed about 5 to a similar organised event. So logic would assume that at any random time THN people aren't going to anywhere near fill the server.
In the old days of the ns server, before I got my res slot, when I got kicked it just made me more determined to get back on it, a 2nd choice haven server, err...sorry 2nd server wouldn't have interested me.
Ronin, I think once a suitable server mod is selected then THN people should apply to get a res slot through the forums, then a small group of people (admins if you like) decide internally who should get these slots. I don't think the criteria would be that strict afterall you have already been invited to join THN.
Maybe these appointed admins could police the server using the server mod?
Good decent players will come back to play in well policed servers meaning it's all the more attractive for us THN'ers to play on and also give us the pick for inviting new people to join and who knows what we could achieve in 2008 in an ED TF2 league.
New people could also bring more donations. I for one will offer my monthy donation to THN again if I am regularly playing on a THN server.
I think there is an opportunity here!