Google Reader supports bookmarklets that allow for the quick sharing of anything that can be displayed on a browser. I believe the code for the Google Reader bookmarket is this (from the Google Reader interface):
One of the advantages of using bookmarklets is that they can be associated with quick search links, and can be triggered with short text strings typed in the URL field of a browser (both Chrome and Firefox support this). Is there any bookmarklet known for sharing in Google+?
Not sure of a bookmarklet but have you seen Surplus;
a Chrome extension for Google+
Post or respond from within the popup
Hope this helps.