I remember Martin's answer to a similar question some time ago. It was something like "Just keep posting great content"
I am guilty as anyone with a slow pace of posting projects or blogs (only 1 blog so far) but I am pretty sure that anyone visiting the site is going to be looking for content that will help them become better wood workers and/or opportunities to share what they know.
An analogy comes from my kayak project. I took it to the county fair and got a few awards for it. BUT the largest award I got was for the display I put together about the build. It was an 18 ft long story board with the content that is in the project posting. The fair manager told me that it was the most successful display at the fair. People would spend up to a half hour reading about the build.
Content that keeps people interested for an extended time is going to build interest and participation.