That idea was done a while ago, like a year or two ago and it was complained about a fair bit and was eventually dropped. I still do have the resources to manually insert a game entry in the list server which will stay there and always ping. But I am against the idea unless a vast majority of the community would like it done.

Though it would be easier if level makers maybe put a link in their levels, eg "Haunted House by So and So. Download this and other levels at jazz2online.com" Word of mouth by JJ2 players playing is the easist and best bet, Jazz2online has tons of content so most JJ2 players will be back once they have visited.