Fruit sharing networks

One of the things the Internet enables us to do is to connect people to under utilized resources. My favorite example is Fruit maps. The first one I came across was in Australia called Feral Fruit Maps.

Next came this example:Fallen Fruit.

The most recent is from that leader in innovation: Cleveland! Cleveland Fruit Share is identifying area fruit trees on public or abandoned land, or in yards of people who don't want the fruit. Notice they are using Ning.

The role of the Network Weaver here is to set up an interactive site and a google map app --and catalyze the process with discussion and/or (as in Cleveland) with a pear picking activity.

What other similar matching activities could we do using the Web?