Since I'm still job hunting, I still look at articles talking about this process. The blogmaster of Ask a Manager writes this recent article about how a resume could hold a job seeker back. I'm not sure if that's the issue in my case, but these articles can only serve to help one tighten your process up a bit.
Besides if the issue is you're not getting any interest, then the issue is something. Perhaps it's the initial presentation you send to hiring managers.