Most blog services allow you to publish a post via a blog editor, via email, via your mobile phone, etc…my phone even has a direct “blog this” feature to blog photo’s straight to a blogger mobile blog.
Twitter take care of the costs, all you do is SMS your blog post to a number (40404) and your entry will appear in your very own SMS blog.
Each post has a permalink and you get an RSS feed.
Your entries also appear on the public timeline, ie. a river of news of the latest entries from all Twitter blogs.
Here is a sample of a Twitter blog, moreso it’s a user space…what really augments this service is that you can have a public timeline limited to just your friends, with a feed as well, to keep up with your friends latest on-the-go posts.
Even better, I can run “my friends timeline” RSS feed through Rmail and get email updates on my phone. Actually, looks like you don’t have to, as phone alerts is built in as part of the service, ie. when you SMS a post to your Twitter blog, your friends can choose to receive this as an alert on their phone.
I wonder if comments for each post would be a good idea, or trackbacking someone that you talked about them…if someone leaves a comment or trackback, you would get an alert.
There is also a widget for your blog sidebar…not a bad idea, people reading your blog can view your latest Twitter posts.
You can even try out Twitter without giving your mobile number, this means you can only update your Twitter blog via the web, and not on the go (kind of defeats the purpose, but still it’s a good idea for those who may want to try out this service and not commit.)