Yea, Sean
I agree that you should move it under the main website. I am not an expert at this but I can definitely see how it can potentially dilute your juice from the main website. It almost seems like it should be on the resources page. I see how you guys have " Showcase| Case Studies| Hosting| ..." I would stick it between " Case Studies" and " Hosting."
What was the rationale behind putting it on a different domain?
