Line Chart with "event dots"

[CrazyChris]

I would like to show certain events as dots within a line chart
similar to this:

which is the page statistics of a facebook page
the dots represent postings, the size of the dot the amount of
postings on that day

For my own software project I have implemented Google's Line Charts
(new version) and it works very well. I would now like to add dots for
showing certain events just like in the facebook graph.
The Line Chart doesn't support this, the combo chart combines lines
with columns, ...

Anybody have an idea how to do/fake this with google charts?

[asgallant]

Would Bubble Charts work for you?  http://code.google.com/apis/chart/interactive/docs/gallery/bubblechart.html 

[CrazyChris]

Oops - forgot to paste the URL of the chart sample from facebook I was
talking about...
Here it is:
http://prenninger.com/wp/wp-content/uploads/2012/03/fbchart.png