Google +1 button added on top rightFeel free to click on that button whenever you like a topic. This is a toggle type button (if you click again you retire your "vote" so to speak).
For each topic there is a different +1 indication, so it can be clicked for as many topics as you like.
Don't miss clicking on it on the forum home page!The main advantage is that your +1's can help friends, contacts, and others on the web find the best stuff when they search.
Read more about this button
http://www.google.com/+1/button/