Yes there are scripts. One way is of course a blog that updates itself. Probably the easiest way. You can use feeds from various sources and have the blog update itself. You can script this yourself, but if you're looking for software to buy, I'm not sure what is the best out there. Most of them are far more than I'd ever pay for, but you can start looking at stuff like this:
WP AutoBlogger - The Power Of Niche Blogging Is In Your Hands!