For me, being an ethical webmaster means always watching out for my blog readers to ensure that I don't recommend a product unless I think it's in their best interest. Though I want to earn money from my blog, I don't make random recommendations just to earn an easy dollar. That includes ad space sold for products or affiliate product recommendations. Keeping my reader's trust is most important. That's another reason i don't sell tweets. I don't want my readers to be burdened with spam ads. What's your own personal definition of being an ethical webmaster or blogger?