looping has been rejected in the Ant2 process, see the "Simple Flow Control" section in <http://jakarta.apache.org/ant/ant2/features.html> for some reasons.
Several implementations of a foreach task (that would be superior to an iterating <antcall>) have been sent to this list, but they'll never make it into the core (probably) - writing one that uses the TaskContainer infrastructure of Ant 1.4 should be straight forward. Stefan