Headless bookmarklet to launch Launchcenter Pro to choose various tag sets from a list and launch Pushpin with title, URL and the chosen tags. You can add frequently used tag combinations to that bookmarklet and add later a few single tags with the excellent tag completion feature of Pushpin.

It is inspired by Federio Vitticci and his headless iOS bookmarklet thing (http://www.macstories.net/tutorials/safari-action-menu-in-launch-center-pro/). 

Jeff Mueller created a web based 'Take Action' bookmarklet builder for iOS. That is also pretty cool. (http://takeaction.herokuapp.com)

If you want you can also get the selected text into the description with with window.getSelection. You have to modify for that the source code.