I want my guest map on to be centered in iWeb site. What am I doing wrong?

Great work on getting the map integrated...

To get the map to display what you want by default, login to your guestmap account here...

http://mapservices.org/myguestmap/

Then adjust the values for "Map Center Longitude" and "Map Center Latitude" until you have it just right. What you can do is to have the Guestmap configuration page open to make adjustments and then have another window with your webpage open to view the changes. Just make an adjustment, then click over to your webpage and reload the page to see the effects of your adjustments.

To get rid of the white space above, below, or around your map... just move your textbox in iWeb around so that the top edge is covered under the textbox where you have your instructions. You can also insert other textboxes and make the the same color as your page background to mask off undesirable areas.