Support for unencrypted EAS was dropped in recent builds of 10.1 and honestly I'm not sure it will come back. Blackberry has made no official statements one way or the other.
Given that Microsoft Exchange server defaults to SSL enabled for EAS and you have to make a special effort to turn it off, and given that in general it's a bad idea to run something like that unencrypted, personally I wouldn't be a bit surprised if it stayed that way.
Though Blackberry should have given some warning before changing that.