If you want the file upload boxes, either the ajax or standard versions, to work properly you need to go into your personal profile and make sure the visual editor isn’t disabled.
Another error gets thrown then if you have the checkbox checked to skip the Ajax uploader button.
It’s a great plugin, but really fussy.
I’m interested in this plug-in. Thanks for the heads up.
It’s pretty versatile, though weakly documented. http://blogs.shu.edu/newarkchurches is running it, and you can see how it organizes the custom fields for you, and allows different kinds of fields such as images. Then if you’re willing to roll up your sleeves and do some php coding in your templates you can do some useful things in how and where you display the fields.