kengr

I gave up on _Spinnerette_ and _Cherry_ but am still reading all the others you mention.

_Superhero Girl_ is good and out in a collectected book form, but not updating online last I checked.

http://superherogirladventures.blogspot.com/

_Sidekick Girl_ is another different take and also good. A powerful but ditzy superheroine from an influential super family is given a competent sidekick who isn't physically super but has stupendous regeneration:

http://sidekickgirl.net/

_Magical Girl Niel_ is similar to _Cherry_ but with a very different setting:

http://www.magicalgirlneil.com/