YMMV. I wish they made their other interface (i.e. in-browser editor) more accessible.
Even after 100 times, I found it counter-intuitive and irritating that clicking "New Post" on my site would launch my email client instead of their editor. The latter is buried somewhere in Settings.
Our web editor is definitely in need of some love, and we'll be updating that later this year.
We're changing our "post" links to all go to the web editor. While email is still the #1 way our users post to posterous, those already on the web want to stay on the web.
For images: we default to grouping them together into a gallery. But you can also separate them out into individual photos.
Even after 100 times, I found it counter-intuitive and irritating that clicking "New Post" on my site would launch my email client instead of their editor. The latter is buried somewhere in Settings.