Timeplot vs Timeline

[Andy]

I'm trying to build a chart where I can include 2 or more time series.
They all use the same time line on the X axis.
The first would be data series, the second would be event series. So
for any given date, i can see the data and the event (news, article,
etc)

It looks to me Timeplot is the better choice. Looking at this example
http://www.simile-widgets.org/timeplot/
I see that there are 3 source events. The first two sources are shown
in the graph but I couldn't find anyway to see how the third source
(US history) is displayed.
Anyone has any example?

On the other hand, Timeline shows the history event well, but how can
I embed a data series into it. I would use google spreadsheet for data
source, if that makes any difference.

Thanks a lot. This SIMILE project is one of the best things I
discovered online.