I appreciate the interest and I understand advertising's role in supporting many content areas of interest to me (radio, college football games on TV, etc.). I have a part-time business of my own. Currently word-of-mouth is keeping me busy enough with my other projects (such as completing our new house), but I foresee the day when I will also use advertising to grow my business.
However, my blog policy is to refuse any and all advertising. My refusal is based on three reasons.
First, I write for myself and advertising has an impact on writing. This is why you rarely see a newspaper write a negative review of an advertiser's product. The newspaper is afraid that the advertiser will yank his ads and does not want to offend. This is why Consumer Reports has never accepted any advertising in their publication. I think this is a wise policy to follow. Even if the advertising revenue is insignificant, it still may subconsciously impact my writing.
Second, advertising distracts from my site. If it works, people will click on it. If it doesn't work, the advertising is cluttering up my site for no useful purpose. Either way it is a distraction from the writings of myself and my commenters.
Third, I am at the point in my life where the advertising revenue is not critical to me. Sure, money is very tight right now as I pay multiple mortgages, but I can see the day when I'll be down to one mortgage again. God has blessed me and I'd rather not clutter up my site and take the risk that the advertising revenue will influence what I do, and do not, say at my site.
However, I am willing to provide publicity for your product (good or service) at my site, free of charge, under my terms. If you send me a sample, I will be glad to test it and review it online. I used to be a director of product development and have some skills in this area. The only catch is that my review will be posted for all to read. So if you have a great product, you'll probably be quite happy with my review. But I will post the good, the bad, and the ugly about any product I review.
I would also like to state that my policy is not intended as a criticism to bloggers who accept advertising. Many people may need the advertising revenue in order to support their blogging and/or may have the ability to blog without being influenced by their advertisers. My policy is determined by what I think best for myself and my readers. Reasonable bloggers may come up with other policies for their sites.