Ah, interesting stuff.
And definitely a good point regarding the often not-unique titles.
Along these lines, something that would seem to be cool and make sense would be a special "URL title" field, so that blog authors could affirmatively choose a reasonably short and/or unique title.
For instance, I have a goofy entry on my blog entitled "And when I sit around the house, I really sit AROUND the house." That'd be hellishly long for a URL! And even if WP could automatically truncate it, that'd be uncool, because what use is "and-when-i-sit." Blah.
Instead, I'd like to be able to give it a short name, like, "being-fat" so that it'd become:
... so the URL would capture more of the essence of the post while still remaining short.
Is this already currently possible?
If not, do you think it's something that could be easily added?
What are your thoughts about this?