A site called LinkShowOff is helping bloggers to make money by providing bloggers a service to create widget to sell links on blogs. Now, we can sell private advertisements on our blog too.
Bloggers are allowed to set the desired amount of payment per link. The default price per link is USD$1.00 per link. I am selling links on my blog at the default price (USD$1.00). You can sell up to 20 links in your widget.
The widget to sell links on your blog looks like the picture below:
I think that LinkShowOff is a new idea to help bloggers to make money from blog. You can have a look at the site to get more information and make more money from your blog.
Try it today: 
