Blogger's one big mobile strength is still the publish by e-mail option. I know WP.com just added this (only 8 years after LiveJournal -- just saying...the fact that I was posting by e-mail and even by audio post to my LiveJournal blog in early 2002 is sort of mind-blowing when you consider how behind the "modern" platforms still are), but WordPress.org support in a way that matches it still doesn't really exist without a lot of bullshit. Blogger, Tumblr and Posterous (and both Posterous and Tumblr have AWESOME e-mail support for photos, chat logs, links, photo galleries, audio files, etc.) are still much more accessible for people who don't want to use a client (or don't have it on their device) or are on a phone with e-mail support that still isn't quite a smartphone.

I think though that what you and I might overlook is that the way we blog - with more "full content" as you say, isn't the way most people blog. Again, this is why Tumblr and Posterous and most especially Facebook and Twitter are so popular. It's just flat-out easy to share a brief thought or picture or link. It's just easy.

So for people that just want to post bite-sized links and updates to their blog, yeah, I think having as much phone support as possible is great. Still, I don't think Blogger is the real competitor in this space -- it's Facebook, Twitter and the other micro-blogging tools like Tumblr and Posterous.

And while I like the WordPress iPhone app -- I like the Tumblr app more. I especially like that I can even have a bookmarklet in mobile safari to easily post to Tumblr (Posterous does this too I think).

Of course, this brings up the whole issue of how WordPress, especially in its core development, is shifting to be more of a general content platform rather than a "blogging" platform -- but that's another discussion entirely.