I don't know why I had never tried this before, but when doing Catherine Pooler's newsletter recently, I saw the banner on her blog, www.catherinepooler.com, and absolutely loved it and wanted to make it work in her newsletter.
And it worked!!!! I'm very excited to bring this new feature to you! Have a banner and just want to make it "clickable", that's okay! Creating clickable banners is just $25.
Need an entire newsletter designed, click here for more details.
Here's a snapshot of Catherine's newsletter template which coordinates beautifully with her blog design (there is even a floral background, but MS Outlook doesn't display it): 
