It’s good to be a WanderNote Pioneer. As the term Pioneer suggests, you are one of the earliest users of WanderNote. So you get a chance to influence its direction. You also get some features that are likely to be premium features later in WanderNote’s life.
On the other hand, there are lots of reasons not to be a WanderNote Pioneer. Some of them are variations on the theme: WanderNote isn’t for you. For example, you might have no interest in using Evernote.
Update: to make things even easier, there’s now a signup page/form.