Re: soory.google.com

> >Loading 'only' 70 KML files is bound to be a bit fraught, generating
> >lots of unnecessary traffic.
>
> I can't. This is only the beginning, and in this situation I wanted to
> know by doing this if google map can handle a big number of files.

Have you considered not using the google-server based GGeoXml, with
its various limitations, and using instead a client-side parser ?

> >Why not use the cross-browser GXmlHttp facility provided in the API?
>
> Didn't find any docs or examples about this function. Do you have any
> link to give me?

Didn't look very hard
http://code.google.com/apis/maps/documentation/services.html#XML_Requests