Foursquare does collect some personal information automatically. This includes your IP address, cookie information and the page you requested. Foursquare says that it only uses this information in aggregate form-not in a manner that would identify you personally. This information is shared with its partners, but not in a way that would identify you, the company says. Gowalla and Facebook Places operate in a similar manner.
5. I'll annoy Facebook Friends and Twitter followers with inane updates.
You've probably seen updates from your Facebook friends and Twitter followers announcing every half hour where they currently are. This is a Foursquare feature you have to intentionally turn on, otherwise your updates don't appear on Facebook or Twitter.
If you enable this feature, note that your location updates will no longer be private-they will appear in public Twitter time lines and will be visible to all your followers.
Similarly, if you choose to link your Foursquare account to Facebook, your updates will be published to your friends' news feeds and will be publicly available if your privacy settings allow people to view your wall. The same is true with linking your Gowalla account to Twitter and Facebook.
covers Consumer Technology, SaaS, Social Networking and Web 2.0 for CIO.com. Follow Kristin on Twitter @kmburnham. Follow everything from CIO.com on Twitter @CIOonline. Email Kristin at firstname.lastname@example.org.
Read more about mobile/wireless in CIO's Mobile/Wireless Drilldown.