I am writing this blog entry from my blackberry, using the wordpress mobile app. Previously I have always used the email to blog feature of word press, but I found when I did it from my blackberry it stripped out paragraphs, so I had to spend time fixing the text afterwards.
You can do most of the stuff you would need to do, I.e. You can format the text, insert media from the phone, and even add location information. Drafts can be saved as you go along, so it seems quite comprehensive.
I am going to try to use it from now on and see how I get on. The picture below is from my phone just to prove it works ok.