I scouted around through some of the other frameworks like jQuery and Fork. They all seem to insist on coupling this inplace-editing and Ajax. I find that a bit strange since they are strictly speaking two very different things. They are often used together but you can certainly think of good uses for both seperately.
There are probably more than one way to achieve what I need. My primary need is that I have several editable fields that have to be submitted together to the server. I could use a normal form but they have to fit into a fairly small area so I think that would look rather "heavy". (Btw, this is my ongoing work on doing some fancy searching that I mentioned a few days ago in another thread.)