It would be a great feature to be able to either export/import (or even automatically sync) tracks/routes to the 'my maps' section of Google Maps. This also allows one to share routes/tracks with other people as well as viewing them.
This would also be a simple conduit to sharing routes/tracks between the Iphone and Desktop versions of memory map. (although this could also be done via ones digital map store login if Memory-Map wanted to implement this on their servers)
It would also allow easy viewing of the tracks/routes in Google Earth (both desktop and Iphone) as this can use the tracks stored in the 'My maps' part of the google account.
There appears to be a simple API to Google 'My Maps' http://code.google.com/apis/maps/documentation/mapsdata/developers_guide_protocol.html#CreatingAccount