Maps intent.... using a pin?

[UNEXPECTED62]

[FONT=Courier, Monospaced]I'm launching google maps via an intent. If I supply a latitude and longitude, no pin will be displayed on the map. Is there a way to explicitly tell google maps to add a pin, and what text to put on it?
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Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse("geo:" + lat +"," + lon));
startActivity(intent);

Currently, this just zooms into a low level of the coordinates, with no pin on what I actually marked.
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