Relay Agent high availability...
it will be great if you can have two relay agent grouped into one pool and the client machines pointed to the pool this will help in sites where the relay agent server can be off for extend times, one server will cover the other.
Joerg Gerhold commented
In sites with more than 100 systems, the configuration of different relays is time consuming! The assignment of a pool and the automatic configuration of a random pool member, but also the automatic change in case of unavailability of a relay/server would be very helpful!