The AdSense Publisher Toolbar gives AdSense publishers two easy ways to access real-time information about their accounts and the ads served on their websites. Pop-up account overview lets you view the following at a glance: • Account earnings summary (today, yesterday, this month, last month) • Top 5 custom channels • Top 5 URL channels • Lifetime revenue In-site ad overlay gives you the following options right in your site: • Instant summary of each ad unit’s earnings (today, yesterday, last 7 days) • Links to go straight to your AdSense account New in 1.4: Publishers logging in with a user without an AdSense account, or with an account in an unsupported state, will now get a better error message explaining what's wrong and what to do about it.
you can download it here