Here’s a cool little Google Maps mashup.  It shows the breakdown of donations to the Republican and Democrat presidential campaigns by zip code.  Here’s the breakdown for my zip code, 27023:

Total Number of Contributors: 26
Number of Democrats: 9
Money from Democrats: $5,310
Percent from Democrats: 19.762%
Number of Republicans: 17
Money from Republicans: $21,560
Percent from Republicans: 80.238%

If you visit the page of results you can also see a map with the familiar Google Maps balloons on them.  Click on the balloon and you can see exactly who gave how much to whom for each donation in the zip code.  Good way to see who your neighbors are supporting.

Here’s the breakdown of my brother’s zip-code, 22314, just a stone’s throw from D.C.:
Total Number of Contributors:
629
Number of Democrats: 326
Money from Democrats: $350,075
Percent from Democrats: 44.527%
Number of Republicans: 303
Money from Republicans: $436,142
Percent from Republicans: 55.473%