i remember i created a tcl script that do this. i will find the code on my backup drive and sell to you if are interested. there's no GUI, its pure script that you can run in your server (or in your pc) manually or via cron job. there's a configuration file where you can put all your url feeds. Only feasible to be publish to blogger site. PM me if you are interested.
Use R2Blogger it is a awesome tool But sad part is that it is paid. But Don't worry.. Its available at very cheap price. r2blogger.blogspot.com Code (markup):