I recorded a screencast of the presentation I gave at AJAXWorld in March, and now it's posted on the OpenLaszlo blog. This demo shows an introduction to most of the basic features of OpenLaszlo, and it also uses the OpenLaszlo 4 DHTML output capability to integrate a Google Map.
Click To Play
I noticed that some people were requesting the source files. I fear that these may be lost to the ether, as I no longer have the machine I used to record the presentation.