I’ve just finished working on a new feature, which is pretty basic, but useful. From your phone you can tag a location(give it a name) and it will be saved on the site. You can then view all your tags on the site, as well as send a public link of the tag to other people. The tagging is currently only supported on Android, but the BlackBerry version will be updated soon(its a quick thing to add). The BlackBerry client will have tagging by the end of this week.
Here is a shared tagged location.
Here is a screenshot of tagging from the Android client:
More information: http://moostrax.com/feature/tagging/