Display an eBay store on your website, and sell products with your own campaign ID. Display them within posts, or as a widget.
Yes. Just enter the appropriate shortcode multiple times.
You may want to display different types of products within the same page. For instance, if you wanted to display iPods and headphones on the same page, you could use the following shortcode:
[ebay id="1" campaignid="0123456789" keywords="ipod" columns="2" rows="3"] [ebay id="2" campaignid="0123456789" keywords="headphones" columns="2" rows="3"]
I got anxious to release the plugin to the public and got lazy toward the end. If there is demand to display more than one column, I will add it in. Most sidebars in WordPress templates will only reasonably fit a single column anyway.