Google Maps addresses/coordinates

I think it would be great to include this to show a map and paste in an address and also make it possible to move the marker to the correts address before saving.
On this site http://www.sigsiu.net/faq/how_to_use_google_maps.html there are tips on how to use this and also moving the marker while looking in the forum. Maybe you can look at this code and import it to your project, would be great?
Discussed here http://www.sigsiu.net/forum/index.php/topic,12743.0.html
This is the forum to discuss Google Maps API and tutorials http://groups.google.dk/group/Google-Maps-API/topics?hl=da
/Tine