What I thought was a smart Idea.
I had this brilliant idea to create a merged RSS feed using client-side processing. The idea was to have a main RSS feed that linked to other feeds. My custom XML would include a list of sources. Then, using XSLT in the browser, the client could merge these external feeds into a single view. It worked perfectly locally! However, I hit a roadblock with cross-domain security restrictions when I uploaded it to my server. The browser wouldn't let me pull in feeds from other domains due to security concerns. Additionally, client-side XSLT processing isn't universally supported. So, even if the security issue wasn't there, many feed readers wouldn't be able to display the merged feed. In the end, the project failed. But, I learned a lot about browser security, XSLT limitations and client/server interactions!