Note: Included in these Ubiquity scripts is a redefinition of the tab noun type used by internal commands. I tweaked it in order to allow to switch to tabs which have no page title (you can also select them by URL now).

Scripts included:

nuke-this - Removes the selected text.
replace-this-with - Replaces the selected text.
detach - Closes a tab and opens it in a new window.
detach-without-chrome - Closes a tab and opens it in a new window without chrome.
open-without-chrome - Opens a URL in a new window without chrome.