Okay, bad example. Change it so that my site provides a tool to convert your blog posts to PDF. That is basically what this web-app is doing right? Is it different if I put it on a non-app looking site (like my site)?

I understand the difference in distribution vs conversion, but it seems like this is almost a mix. I actually think this service is pretty cool, even though I hate PDFs in general... but I still had to ask. :)