No, only the Gold, Silver, and Bronze accounts have the ability to upload recorded audio, videos and flash.
Yes, you can link to a graphic, audio file, video file, flash, or document. To add a link to an image, media file, or document, put your curser where you want the link on the page and then click the "Insert Hyperlink" icon. This will open a new window...
Graphics must be either GIF or JPEG format and end with either .gif, .jpg, or .jpeg.