Timeline .NET is the most complete ASP.NET User Control (WebControl) which wraps the MIT Simile Timeline API (http://simile.mit.edu/timeline/).
Control such things as the data feed which can come directly from an RSS feed or add Timeline Events directly with a fully managed API. You can also control the Height and Width of the Timeline itself; the Bubble Height and Width; full control over
type different bands in use (HotZone, Original, Standard) and adding any number of Zones to each band, etc...
Simile - Timeline
Detailed description, installation and usage
Sample Test Application
Sample output of Scott Guthrie's RSS Feed: