I've added 3 new features to the site: Attachments, Inline Images, HTML Formatting and Auto-Links.
Attachments You can add multiple attachments to a comment. Below the text box you will see a button labeled [+] Attachments. Click this and you will be prompted to choose a file one at time and attach it. Maximum file size is 512 kb and supported file formats are: gif, png, jpg, jpeg, pdf, doc, rtf, zip, rar, txt, gz, tar.gz
Inline Images Once you attach an image, it will display within your comment automatically. See below for example of how an image is displayed.
HTMl Formatting You can format your comments using HTML tags. No Javascript is allowed. Make sure you select the HTML radio button below the text box.
Auto-Links For auto linking to work make sure you include http:// before the URL.