Detailed feature descriptions can be found here.
Additional features are being aggressively developed - we do what we do.

feeds: Content source (typically XML-based). RSS and Atom are the most popular feed formats.

filters: Rules that block or allow posts only if designated criteria are met.

channels: Spliced content sources (primarily feeds). Feed Rinse allows you to define rules for your channels.

meta filtering: Filter out entries containing information such as specific keywords, author, or tag. Can you feel that? That's the feeling of getting your life back.

opml import / export: This feature allows you to import all of your subscriptions in one fell swoop. To get started, just export subscriptions out of your RSS reader. These can be imported directly into Feed Rinse. Once you've set your filters, a new OPML file can be imported back into your reader. That's it, no voodoo required.

bookmarklet: By dragging our [Feed Rinse] bookmarklet to your bookmark bar, you can automatically add the subscription feed to your account.

profanity filtering: Whether you're in a corporate environment or the bad words just plain burn your eyes, our optional profanity filter is a champ at taming the foul-mouthed blogger. Many offending words are replaced with @$!*. Posts in question contain a quick note below the message to let you know it was purified. The profanity filter can be toggled on or off in your account settings.