A dynamic image that can be called with syntax like:
<img src="path-to-program?outputstyle">
The image would generate a graph of each candidate's delegate count, along with a mark indicating how many more delegates each candidate needs to actually win. It may also show how many delegates are available for the upcoming races, and perhaps may even have projections for the next batch of races.
The graph would be generated by a process that reads these values from a database, and then everyone everywhere could include the graphic in their html on their weblog or whatever.