I would want the ability to add different classes other than just h1, h2.
Most of my projects will be using twitter bootstrap or jquery UI so it has to integrate well.
The link popup does not have the ability to add a target. For UGC, I would like the ability to force a target and add google analytics code.
It's good to hear that people will pay for a good product, even with the availability of free alternatives. Of course, we would have to offer a superior product.
We already have the ability to add different classes than H1, H2, etc. and we can do this very elegantly. In fact, we support something called named styles. Here's a few definitions.
Title: div.title > Subtitle
Subtitle: div.subtitle > Normal
This tells us that we have a named style called "Title" that is represented by a DIV element with class "title" and that after you hit enter at the end of it, it will end up in the "Subtitle" named class. This is already implemented but not exposed because we haven't built the UI for selecting Named Styles as a dropdown in the beta. This will be in there for the production release though.
We will most likely have sets of "Named Styles" that are compatible with Twitter Bootstrap and other common frameworks at some point. You will also be able to easily create your own Named Styles, probably in an online UI that will build your editor for you.
Note that once you define the Named Styles, the editor whitelists to them so you can't get "illegal" element/class combinations which lets you (the developer) keep the HTML consistent for your needs instead of hoping your users won't break your styles.
We'll keep in mind the ability to add a target for links. We hadn't thought about the need for this until you mentioned it.
TheSunny
[edited for spacing]
Different classes and better link handling are on the roadmap which you can find on the "What's Coming" page.
We plan to make the UI easily modifiable so that you can use anything to style it. This is one of our goals.
There's a lot more to come.