This is very interesting! A scrollable web based timeline for data. The SIMILE project describes it as:

Timeline is a DHTML-based AJAXy widget for visualizing time-based events. It is like Google Maps for time-based information.

You can take a peek at their example of it here, I stumbled across it by reading the recent email on the dasBlog email list. Some of the blogger's on the list think it would make a unique way to present blog posts! And I agree, but apparently there are some serious performance issues with large datasets.

But it is an interesting concept and I am willing to bet that with the dasBlog folks looking at it there will be a resolution to the performance issue!

Cheers,

Robert Porter

Update: Scott Hanselman just blogged about this as well, take a look here.