Announced in Google+ today from Google employee Timothy Jordan and reshared from Google employee and friend Louis Gray the new +1 extension for Google Chrome. You can download it here: https://chrome.google.com/webstore/detail/jgoepmocgafhnchmokaimcmlojpnlkhp
Also this is just phase one of the +1 button as stated in the google+ post by Timothy. “It doesn’t yet have the ability to share to Google+, but we’ll automatically update it over time after you install it. So be on the lookout for new +1-tastic features in the future”
I’ve installed it and will be +1 various sites now easier using the Google Chrome extension. Note it also rumored that Google may be changing their search algorithm based off the usage of the +1 button.