I don't think you're going to find anything on Multiply to facilitate iPads. I don't see how the structure of it makes blogging easy. And I think this would be an iPad issue, not a multiply one but I could be wrong. I mean, iPad wants users, so they need to make their hardware and software work with the sites, not the other way around.
Also, I think they are limited in kinds of sites you can view. Again, I don't know for sure. I've heard people say there were some things they can't do on an iPad. I think that is why those Netbooks have become so popular.
Hope you get it resolved. You can post blogs from email to multiply and blogger. I did that often because it is easy. But as for how things look on iPad, not sure how to fix that.