Gowalla, the check-in service that competed with Foursquare, has opted out of direct competition with version 3.0 for iPhone (free, App Store). The app now let’s users, called Passport Holders, link to their Foursquare and Facebook accounts. The app also lets users view their friends’ check-ins from the three services. The user interface has been improved, with the check-in button accessible from the toolbar.
You now longer ned to to draft a message while the app finds the user’s current location, have also been addressed. Posts can be made directly to Twitter, Facebook and Tumblr. Notes can be made on locations for users themselves or friends, while highlights can be added right from the iPhone app. Highlights are now viewable.
The update  requires iOS 3.1. The new version roll-outs for other platforms in early 2011.