I didn't realize you could comment on EZA articles. I thought this was a great suggestion and many people agreed.
Here is one quick tip that I'm now implementing: Subscribe to the RSS feed for the EZA category that you are involved with. Whenever you go through your blog reading (I like Google Reader), you'll now also see new EZA articles that might be of interest to you. If you are adding value (you should not spam), then using an RSS reader and commenting on EZA articles should be a great way to generate backlinks and get some traffic.