Here’s a cool little Google Maps mashup: simply visit www.locateatms.com, type in a zip code and then click "Search ATMs".  It will bring up a Google Map with all the ATMs in that zip code indicated, then if you want to find a specific bank’s ATM you can select that bank from a drop-down window.

One problem I had is that the bank selector field shows up on the home page even though it doesn’t function until you search by zip code which can be confusing.  Still, pretty cool little application.