Hi,
For the next release I have added logic so if you save a blog with a blank url it will generate one server side based on the title.
I would have thought that in most cases this would not be a problem because when you create a new blog post the title has the focus first, so if you enter the title first then it would be expected that by the time you finish with the body of the post would be plenty of time for the javascript to suggest the url from the web service.
Best,
Joe