Can I upload media to a specific folder?

By default, media uploaded through the WordPress dashboard goes into a folder determined by the current date. For example: /wp-content/uploads/2011/09/. Once the media is uploaded I’m not seeing any options in WordPress to change the location of my file to something else.

Uploading Multiple Attachments From Front-End With A Description

I am working on a WordPress site that has a custom front-end submission form for adding in a post of content type, ‘sketchpad’. The form has a section that allows you to upload multiple images with a description field which is going to be used as an alt tag. What is an easy way for me to upload multiple attachments with accompanying descriptions from the front-end?

Trigger JS when featured image upload window is opened in admin

I’m trying to hook up some JS so that when the featured image upload box is opened and an image selected I can use Vibrant.js to analyse the colours of the selected image. The hurdle I’ve encountered is that I can’t find any particular event to bind my function to. I’ve looked at various tutorials regarding the wp.media() object, but they all seem to involve replacing the upload box completely. Is there no straightforward way of detecting when the featured image upload window is open and the selected thumbnail preview image is loaded?