Google allows you the ability to use multiple gmail accounts at the same time through multiple sign-in or email delegation each with their own pros and cons but for me delegation works best because of no limitation of how many email accounts you can have open at once in one browser (multiple sign-in limit is 3 inboxes). The problem with delegation is that you have to login to the first gmail account and then use dropdown menus to open the other accounts.

This tutorial will show you how to easily and quickly open many different gmail accounts in one browser using bookmarks, quick search keywords and keyboard shortcuts inside the Firefox web browser.

You see how great that +1 button could look on a dark background site design?

Well unfortunately that is impossible because of the way the Google +1 code is setup. You can change the size of the button, the annotation and many other things but for some reason Google has decided that the design and colors of the +1 button can't be touched by anyone which in turn makes it clash with MANY website designs thus making it awful to implement.