In general, in an aspect, the invention provides a method including prompting a first user of a first mobile communication device to invite a second user of a second mobile communication device to become associated with a virtual community associated with the first user, sending a first notification from the first mobile communication device to a gateway in response to the first user inviting the second user to become associated with the virtual community, sending a second notification from the gateway to the second mobile communication device indicating that the first user is inviting the second user to become associated with the virtual community, and prompting the second user, upon receiving the second notification at the second mobile communication device, to become associated with the virtual community.
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