when you display the list of hosts, check up the top of any 'no replys', it might be that the connection isn't great and it's not replying to the ping requests properly
its actually for the 'racers' benefits. I don't really want every Cruiser at LTC to go "oh my gee, Krammeh has made a race server, lets go on it"... :P - not to start with, need to get the quality of the racing up to spec first!
altering redstone while the current is on, is different to when the redstone is switched on. (I don't think it should be, but it bugged me for a while)