The SRV record is interesting -- basically extending DNS from a (name) -> (address) mapping to (name, service) -> (address, port) mapping For whatever its draw

The SRV record is interesting -- basically extending DNS from a (name) -> (address) mapping to (name, service) -> (address, port) mapping For whatever its drawbacks, IPv6 at least requires few application-layer changes. So I think it's a better solution to the problem than SRV records.