He's keeping the 
http://www.tb-run.com/ site going , it's for TB races, You can start a race and other can join.   both sites must use the API  to get the trackable info 
your user name on the sites had to match  so it would correctly  allow you to choose your TB's .  Each day the tb-run site polls geocaching.com  for info on the tb's in all the races ,  and updates the race stats,   I assume it does the same  for the rescue tb's   Keeping track of the Tb's should be pretty easy using the API  ,  You already have the mapping ability in project-gc,  You would just need a  database of rescuers so they can sign up and be able to select a  area or areas  they would want to watch,   So when someone enters a rescue request,  it would check the  current location, and check for rescuers in that area, and send them a email  saying theres a new tb waiting to be rescued,   There would also be a global map showing all tb's  with rescue requests , People can check .  A rescuer or rescuer's if there more then one would acknowledge  they will go look for it  , in return the tb owner would get a email saying someone is going to look for their tb ,  when the rescuer  completes the task, he either marks it successful  or  not  , and it emails  the  tb owner the results ,  the rescuer is also encourage  to log a note or a pick up of the TB depending on what happened. 
Also if someone else picks up the TB, it emails the owner and the rescuer that it's been picked up and closes the rescue mission   Tb rescue also provided you with a html  banner  you could paste into your profile  to display  how many tb's you rescued and link back to their site.  Maybe Sascha  that ran the site might share the existing code