Here's some screencaps of the Realtimeboard that I use to run and track things for the Necrocarcerus campaign I'm running on Google Plus. Of the various whiteboard programs I've looked around at, Realtimeboard seems to be the best for my purposes. I use the free version, and if I could improve the program in any way, it would be for Google Hangout integration, so I could use it in real time while playing. As it stands, it's mainly a repository for campaign information.
This is the map of End-of-the-World and surrounds, out in the Far Lands of Necrocarcerus, where the campaign is set. It includes both areas the PCs have visited and explored, areas they've received some sort of direction to. The pictures may not show it, but there's a grid (though this map doesn't really use it).
I use the post-it notes to track quests. Purple is a quest-giver contact, orange are open contracts, and pink are leads, ideas, and tasks requiring PC motivation. This is the top half of the map with its quests. Also, it isn't shown here, but each of the locations has a comment bubble on the actual board that contains an update about what's happened there recently.
This is the bottom half of the map with its quests attached. This is a "player-friendly" map - everything on it can be seen by the PCs. I also have a hex map of this area which I use for calculating travel times and running hexcrawls, which is a DM-only document generated with Hexographer.