There's also the "easy to update at work" mapping approach I use.
1 - Using Excel, either
A - paste a map in there and line up the grid with the Excel grid (I did this for Necromancer's Skull stealing a map from WotC's archives), or;
B - create a map in Excel itself via colored squares/borders (I'm using this now in Ebon Mirror).
2 - Use icons such as monster images or user profile pics to track combatant locations. You can draw squares of different colors to use as pic borders to differentiate different creatures of the same type pretty easy.
3 - Screen cap it, crop the screen cap in Paint, save as a jpg, upload that to TinyPic.com, and you're golden.
I also paste monster stat blocks into the Excel file for reference, and keep track of round by round actions off to the side in a tracking grid. It's my one-file-fight-friend!