I've been using the Google BlogThis button to post entries to this blog. It is very convenient. It is useful whether or not one wants to refer to a web page. Click the BlogThis button and a window pops up for the entry. When done, click on Publish, and the entry is sent to your blog in Blogger.
It is even easier to use than sending an email message to blogger.com, which is another way of posting a blog entry.
Of course this give Blogger.com a significant advantage to other blogger sites. But it shouldn't be hard for other sites to implement a similar capability.