Sounds useful. Interesting suggestion. In the meantime, here are some workaround ideas to help you keep track of players. Each player has a Profile (found by clicking the person's name on the Roll20 forums or Player Directory). In your web browser you could keep a folder of Bookmarks to the Profiles of players you like. Another way is, start a campaign (starting campaigns is free, and unlimited). Call the new campaign something like Bruce's Friends And Player Dossier, or Awesome People Tavern, whatever you want. Invite the players you want to associate with to join your collecting campaign, where everyone can chat about when to start a game, and spin off new campaigns from that group.