“Press This” automatically credits sites you reblog content from

The moment you click “Press This” and the post editor appears, a link to the site you’re quoting content from appears at the bottom of the post. The link reads “via,” followed by the title of the page you’re quoting from. The title is linked back to that source page.

No matter how easy a tool makes it quote and republish other people’s work, copyright is still an important issue. Make sure anything you re-blog is not restricted, and that you provide proper attribution to the original source.

via Press This for WordPress Speeds Up Blogging.