First of all thanks for such a nice plugin. I have reviewed the code and its well written as well. I have been using it since last couple of months, and found that it lacks support for custom post type selection and as you cannot provide long list of post types on selection screen (as it might confuse the user and ofcourse will effect your plugin UI => I I like the way it looks in current version), so I was wondering if you could provide an option on widget selection screen something like
An option for users who select checkbox "All Posts", and if they check it, you should provide a text box (textarea) so users can enter their custom post type name there (either comma separated or whatever), and on frontend can do something like
check if its singular and user entered any custom post type (by default if user doesn't enter any it should work for all singular posts), then match current post type against it and show / hide accordingly???
If you like I can contribute my time for this feature????
Let me know what you think........