What"s the best edit-in-place plugin for jQuery?

I need an edit-in-place plugin for jQuery but there are quite some around. I've been testing jeditable ( http://www.appelsiini.net/projects/jeditable ) but it lacks some basic options (like hover effect). I also found JEIP ( http://josephscott.org/code/javascript/jquery-edit-in-place/ ) which has recently been developed but comes with much more settings.

Get query string values in JavaScript

Is there a plugin-less way of retrieving query string values via jQuery (or without)?

How can plugin systems be designed so they don"t waste so many resources?

I am trying to build a basic plugin system like the kind you often find in a CMS like WordPress. You have a folder of plugins which tie into the main system's operation through event notifications using an Observer or Event design pattern.

Any reason not to use $(test).stuff(); vs test.stuff(); given that test = $("something");?

Google isn't helping me figure this one out. Is there any reason not to do the following: