A week ago I did a pull request to add UITableViewCellEditingStyleInsert iOS API as styleInsert
You can find the blog write up here: http://blog.codexlabs.com/blog/2013/08/31/uitableviewcelleditingstyleinsert-is-now-a-pull-request-for-titanium-mobile/
This is a change that I have held onto for over a year and feel that it should ultimately be contributed back into Tableviews and now listviews.
I would like to start the discussion on what the actual API to call UITableViewCellEditingStyleInsert should be in titanium.
Also, I need to sign the CLA (I can't believe I haven't signed it already)
It would be great to see this API finally supported in Titanium.