Re: Show national borders in hybrid map type with higher zoom level

not as far as I know, but I have done a (sort of) workaround.
http://www.evilc.com/phpbb/gmaps.php?action=seek&seekmode=location&location_id=17
hover your mouse over the highlighted (London) marker.
Also some of the stuff used on maps.huge.info may be of interest.
Basically, using XMaps' XPolyline it should be possible to add your
own.