Location CCK & GMAP View: Unknown column 'location.latitude' error .. or HOWTO ?

Hi,

I'm getting a Unknown column error, when trying to run a view for a node type that uses Location CCK to handle an Address.

I'm kind of assuming that this error is due to the Location GMAP Views support not being entirely nailed down yet.

e.g. when looking at the settings for the GMap Views Style plugin, the following is displayed:

Grouping field:

You may optionally specify a field by which to group the records. Leave blank to not group.
Macro:

Data Source:
Location.module
Fields named "latitude" and "longitude" @@@TODO
Marker handling:
By content type (for node views)
By term (for node views)
Use single marker type

But, perhaps I'm mistaken and it is possible to get a GMAP View to display for nodes that use location cck.

Any pointers would be appreciated.