Like Perchik, I too like Blogger.com and strongly recommend it if you're the type who does not want to tinker with the HTML/CSS templates directly (although Blogger allows you to do that too).
The current version is now much friendlier to non-techies because the settings pages are friendly and allow you to select and customize templates without altering a bit of code.
Their recent integration with Feedburner for tracking RSS subscriptions to your blog is also a plus, IMHO.
Blogger also supports mobile blogging, although I have not yet heard of anyone updating a Blogger blog from an iPhone. *Sorry*