Criteria to get an app accepted?

I've developed an open source note-taking app, which currently needs to be installed but since it only reads and writes from its own profile directory it would be easy to make it portable. As a PortableApps user myself I wouldn't mind doing the extra work to package it.

I'm wondering though what are the criteria to get an app accepted here? Basically before doing the work of making it portable and packaging it, is there any way to know if it's going to be accepted?