The new PressThis solution

It took me awhile to find the old bookmarklet solution, now that WordPress has upgraded the PressThis functionality.

Here’s a copypasta from (and a link to) the WordPress codex page:

Using this bookmarklet to publish posts does not pass the $_POST[‘post_type’] variable with the value of “post”.

The bookmark calls

u = the url of the current page
t = the title of the current page
s = the text selection from the current page
i = url of an image file

Edit the bookmark within your browser to change the values passed if necessary.