I'm currently looking at ways to allow people to select multiple files at once to batch upload images. I'm evaluating these options for my ASP.NET web app:
I'm leaning toward YUI because the documentation is clear and I basically already wrote the file uploaders and thumbnailers which Flajaxian provides, the javascript seems more compact too. I can't even begin evaluating Dojo because it's unclear to me how to get the parts that would integrate with .NET out of the PHP examples.
Has anyone had really good or really bad experiences with any of these?