Want some easy to use forums? Check out Lefora.
Meetro beta is useful for letting you chat by text with users of all the major IM apps, but the location-based features that set it apart from the crowd aren't so alluring.
Pricing not available
This small program brings together instant messaging and localization so you can get in touch with others in the area.
Location-based mobile social network has just released a new version that integrates both Twitter and Yahoo's Fire Eagle.
Search forums with Twing.
BrightKite tells you who to hang out with based on location.
Web forums may be seen by some as an aging Web technology, but products like Tal.ki are pushing them into new territories.
SF Beta: Web 2.0 as haiku