I have been using jQuery for quite a while now and I still consider it to be one of the best tools for javascript development. There are bigger js libraries around, as well as ones that offer more eye candy but i still find the simplicity, easy-of-use and power of jQuery, extremely useful.
I have seen an explosion of component becoming available for jQuery (sometimes, it is too hard trying to catch up with all the new ones that keep coming out).
One component I have always wanted, is a multi-file upload dialog that also offers visual feedback. There have been a few but they never did seem to hit the spot for me.
Now, there is a new one, called jQuery file upload plugin, by Ronnie Garcia, that seems to have got all the right answers.
Visit Ronnie's site and have a look at it.
If you enjoy what you see, leave Ronnie some feedback of appreciation.