I've got most of my Bf roadmap for 4.0 done now. I just added a "wizard definer" interface - a tool that allows you to add in your own feed builders. I support a bunch of sites (like Feedster), but I'm sure there are search feed sites I'm missing. No problem: you can define them in now:

Just give the builder a name, the basic URL, and the search query form. The new builder will show up in the menu when you open the search feed builder, and you're off. Next up - tabbing the html pane. After that's done, 4.0 will be out the door.