[TYPO3-mvc] edit multiple objects in one form

[Tim Schoch | GSTALTIG]

hello list

for a clientproject i need a way to alter properties of all objects in one form. (think of a big spreadsheat)
i've searched this list und google and found not too much on this topic.
My thoughts: 
As the default updateAction expects a single, validated object I could change it to recieve an array instead, fetch all objects from the database, apply the changes, validate and persist them. (error handling might be a bit complicated)
A second aproach would be to use AJAX like Michael Knoll mentioned in his updateGenericPropertyAction (http://bit.ly/lfevIW , kaktusteam.de -> blog, search for Overlay Editing )

What do you think, has anybody used something like this in a productional environment?

cheers, tim