UPDATE: Here’s my hands on review of National Geographic topo maps for Magellan receivers.
Magellan has extended their ongoing partnership with National Geographic, bringing USGS raster topo imagery to the eXplorist line. Just like Garmin’s BirdsEye Topo, this will be a subscription option running $29.99 per year.
Compatible with the eXplorist 310, 510, 610 and 710, the topo maps wil be managed and transferred using their VantagePoint software. 
The new maps will complement their Digital Globe satellite imagerysubscription program. And in a smart move, Magellan will also be offering some eXplorist models bundled with the maps.
Here’s the full news release.
About Rich Owings
I don’t want to steal the light for eXplorist, but National Geographic sent out a patch for its new states topo software that can also be export topo maps to the Oregon, and Colorado series
Version 4.5.0? I think that just adds some support for transferring waypoints, etc., and doesn’t allow the export of custom maps.
Okay, but what stated on NatGeo site:
“Now fixes Triton export issues on Windows 7 ! Our latest release for Triton and non-Triton owners alike. It’s available as a free upgrade for anyone running version 4.0 or later. This update adds support for the new Garmin Colorado, Oregon, Nuvi, and Edge GPS devices, as well as the Magellan Triton series. ”
is a bit misleading. I thought the software would already support Garmin’s unit even though Garmin unit does use NatGeo’s topos. Garmin probably will not allow their units to support NatGeo’s map they would probably lose a lot money for their maps…
It did already provide some support, but it’s probably a bit better now. I don’t think Garmin can really control who can send maps to their products, as TopoFusion and ExpertGPS both do it, although NG would probably want some sort of formal agreement before going down that path. And you’re right – Garmin probably has no interest in that.