All the user is reqired to do is create an account and provide information that will help match you with what you are looking for.
Also, Landshare has just recently created an iPhone app that allows you to access Landshare on the go.
This site was founded by Hugh Fearnley-Whittingstall in Dorset, UK. Hugh Fearnley-Whittingstall is a celebrity chef who came up with the idea after helping families plant crops on some derelict land.
So far, there are 59323 members of the site.
For more information, click here to go the the Landshare website.
To see the TED Talk that inspired this research, click here.