Great job on SPServices. It really helped me get my foot into SP.
I was wondering if you have any plans to release a version that uses JSOM? I know REST is the way of the future but I use JSOM for somethings REST doesn't have like getting per-list-item permissions for the current user.
I know JSOM is pretty straight forward but having to write the same code over and over every time I want to make a JSOM call gets annoying. I started working on a convenience library to simplify tasks like getting all lists on a site, getting list details,
and getting all items in a list in a view. I figured I should probably check if you're already working on something like this before I finish mine.