RSS for your portfolio can be found by adding .rss to your portfolio URL, like this. Entries are displayed chronologically, and it updates automatically whenever you make a new post. Enabled by default, but can be disabled under portfolio settings.
A dump of your entries (raw HTML) can be made if you are signed in. Just click 'portfolio settings', then 'output'.
PDF downloading is enabled by default for new portfolios, but can be disabled if you like.
Images are embedded into the file as thumbnails, with a full link to their source beneath.