The National Institute For Literacy (NIFL) has several excellent listservs geared to both ESL and non-ESL literacy instruction. I’ve highlighted some of them on The Best Resource Sites For ESL/EFL Teachers.
They’ve just begin begun an interesting online discussion on Literacy For Social Change. It’s not specifically targeting ESL instruction, and it’s focused on teaching adults, but it’s clear that a lot of the content is adaptable to all education levels.
You might want to check it out.