I am sure there are other publishers such as myself out there that check their Adsense accounts every few hours. When I first started with Adsense I used to check it every 15 minutes. I wish they had this plugin then. The Adsense Notifier for Firefox automatically displays your adsense stats in the lower right corner of your Firefox browser. It allows you to see your stats at a glance without browsing to the adsense website.
As you can see 2,000 impressions, 50 searches, 2.50% search clickthoughs, $5 eCPM and $10 total revenue.
It shows the time until the next update.. you can change the update interval. Get the Adsense Notifier and other Firefox add ons here