If you want to enable it for your own blog, this is a beta service under Settings - Email and Mobile. (you may have to access it from http://draft.blogger.com )
The examples on this page are from Blogger's preview, and it certainly doesn't look like this on my Blackberry. So, it may look slightly different from one device to another - if any of you have some form of mobile, like an Android, iPhone,Windows Mobile or newer Blackberries, I'd appreciate it if you could let me know how things look.
It would appear that comments aren't yet formatted, but Blogger beta stuff can always change. So, hopefully they don't break anything as they tweak.
The only problem of course is that my posts are often photo heavy. This could mean slow load times and I hope you have a good data package.
As you can see, both posts and pages are supposed to format and shrink to fit a smaller screen.
At the very bottom is the option to view the page in the normal web version.