Some good things have come from meta tools. I would say that a search engine (index the Internet and make it searchable) is very meta, but it seems to be working well for google. How about group buying... All you're doing is aggregating buyers and sellers. Seems to work well for groupon and all their clones.

I don't see a problem with building a meta tool, or a meta meta tool. It sure beats sitting around and watching tv- thats not... Anything. Go build something useless, I give you permission. It worked out well for Larry and Sergey.