One of the nice things about WordPress is that they also have a free app on the iPhone for blogging. I looked for an app specifically for Blogger but could not find one. All the apps available for Blogger are third party and costs at least $2.99! I'm still looking.
The WP app allows you to work from any of your active blogs. You can view new comments that have come in and deal with them (spam, delete, approve etc.), create a new entry on your iPhone and edit and preview your work. A nice app, all in all.
So I got on the beta testing group. Looking forward to do my part in helping create an even better product.