I've been quite satisfied with Blogsy, the iPad app for blogging. I struggled a bit with it at first, but lately I've been posting a lot from my tablet. It was especially helpful during the DDoS siege at Typepad this past week. While I couldn't access my dashboard through the typead log-in page, I was able to post several times using Blogsy.
Anyway, I ran into a problem that seemed like a bug in Blogsy, so I contacted them for assistance. The American CEO of the company (it's a South Korean firm), Lance Barton, responded personally to my request for help. That's how you build customer loyalty and get a blog post praising your app.
Anyway again, the problem turned out to be an iOS bug, not a Blogsy glitch. It's resolved now.