It was pretty hard, but I finally managed to make bartleblog re-render only the necessary pages.
In fact, now my blog has a few less pages because some random stuff was generated in the past, and never got deleted.
There are still some bugs but, with this, it's a reasonably useful app.
Alternative comment system based on JS-Kit
Flickr photoset directive
Nicer Openomy tag directive
Flickr and Openomy uploading
Many config pages and wizards
Lots of UI love
FeedBurner support to automatically use their version of the RSS feeds
Other than that, it's pretty much feature-complete, or at least it has enough features a nerd can use it to post a blog just like this one, for whatever that's worth.