I've been rewriting more of the code to optimize posting and editing. In the process, I discovered and fixed a few bugs, though most of them would only be noticeable if one used the rewrite history feature to back-date posts. The rest dealt with the chronological titles archive, which weren't being properly generated for categories.
That being said, posting and editing should be faster then they have been. I uploaded a number of speed optimizations. I've moved more functions over to the schedule/marshal paradign. I also rewrote the core loops in a few commonly called functions for writing archives so that they're now substantially faster. I think that the front archives and complete weekly archives page are now written in about one tenth the time that they had been taking. The chronological titles archive pages now take about half the time that they did previously. The RSS feed generation has been very marginally improved. All in all it should result in a noticeable increase in the speed of posting and publishing changes.
We're on the way to instantaneous publishing. :-)