I found this article particularly amusing today and although EKM Powershop are B2C ecommerce specialists there is lots you can take away from this read.

As a CANDDi Consultant I get asked for my advice on B2B site layout quite a lot - even if your site doesn't have an "Add to Cart" button the principles are very similar as the ones in this article.

I believe you will find it as interesting and as entertaining as I did!