I think your site is quite good. I even have PCCT setup for my daily Avantgo download. Keep up the good site and more will come. And if it were so, these 35 would be the best informed on ppc matters. I read this site every day.
Content is very current, more variety of news offered, and format is simple and quick to read.
If I wanted to read lots of old archived info, i'd probably have an easier time at one of the other sites.