If there is a defining feature in Apple's Leopard, it's Time Machine. As cool as it may be, the fact is that we, as Linux users, are obviously not going to see much benefit from this is pitiful. So it's a good thing that open source developers have taken it upon themselves to create something similar, be it not a 'pretty' alternative.
Going Back With Flyback. A needed GUI alternative to rsnapshot, Flyback provides much of the same functionality, but does so with a nice GUI wrapper to make the entire process more user-friendly. The UI appears to be GTK-based and overall, it's impressive. Just about everything you want from rsnapshot is here for the common man to make the most of it with.