Alltop lets you browse the latest posts from many, many blogs based on the topic you’re interested in.

For example, here is their Education page.

Of course, if you’re primarily interested in browsing blogs written from ESL/EFL teachers, Carla Arena, a very talented Brazilian EFL teacher, has put together a great PageFlakes page aggregating the recent blog posts from over twenty ESL/EFL teachers from around the world.

These teachers participate in Webheads In Action, an international group of ESL/EFL teachers experimenting with technology in teaching and learning.