In the admin bar, there is an icon that will tell you if there are plugin updates. Whenever you hover over it, it will say something like "1 plugin update". You have to click on it to go to the update page, where you will see which plugin needs an update.
I'm too lazy to do that. I would like to have a list of the plugins that need an update in the title tag of the icon. This would give me a clue about how critical the update is (yes, I know I should update all plugins all the time, but I prefer to give priority to security plugins over, say, SEO).
So what I would like to know is:
1 How do I access the list of available updates?
2 How do I deliver this information to the update icon in the admin bar?