You can use Facebook's native Notes application to subscribe to one RSS feed and have it appear in your Mini-Feed. Click on "Notes" under Applications, then click the "Import a blog" link on the right-hand side of the Notes page. Enter the URL of your blog's RSS feed and it starts importing posts.

FYI, the first time it imported posts from my blog, it grabbed the ten most recent, then about an hour later it did it again. I just went in and deleted the duplicates, since then it's run flawlessly.