See comment elsewhere: With tagging or (simple plain text) notes attached, absolutely. Even moreso with a simple API and/or support to push the cached content to my own server. If it could be selectively enabled for private content too, then even better (e.g. there's several extensive private Wiki's I use regularly that are not sensitive enough that I'd worry about getting them indexed, and I'd love to be able to tell you to index them but perhaps disable the caching).