I just found out about this new feature that GC.com has implemented. You can get instant notifications for new caches within 50 miles of any point (say, your home). Other options include notifications for caches that get enabled, disabled, or removed.
Not that I'm exactly a first-to-find addict, but this is a very useful feature. Check it out when you get time. You can find it under "Member Features", then "Instant Log Notification Feature" on the "My Account" page.