Starting within the next month, iGoogle will be undergoing some significant behind-the-scenes changes. The first recipients will be gadgets in open syndication, which will gain support for gadgets.*. We've worked hard to make sure gadgets work properly with the new architecture, and gadgets that use _IG_* methods should still function properly. However, there are two things that you, as a developer, should note.
First, support for datatype=location is now deprecated, and you should use another method, such as the Google Maps API geocoder, for positional data.
As always, if you have issues, let us know in the iGoogle Developer Forum.
// js code goes here...