Posted: 12/1/07; 8:23:45 AM.
Thanks to Scoble for driving this. Now there's a Share This Picture button at the bottom of the Picture Viewer page. Press the button and a form pops up with a place for a title and description, pre-populated with the title and description that the original photographer provided. You can edit either, then click the Share button, and it is added to your RSS feed. The form is displayed again, but this time the Share button says Update, so you can continue to edit as long as you want.
There's a new Prefs page that allows you to set the title and description of your feed, and choose a password so that no one else can upload your feed (lightweight blog-style security). There's an option to have your password mailed to you. (To do: find a mail server to relay through.)