Today, version 3.2 is available, and offers Flickr, SmugMug and ImageShack compatibility. Just click to send your image on its way. You can also annotate images with text, flip, rotate and more. Plus, ImageWell offers support for FTP, .Mac, SFTP and WebDAV. You can even designate a local folder for export.
ImageWell is free. However, you can purchase the "Xtras pack" - which offers features in addition to those mentioned here - for $14.95US.