Google Latitude for iPhone

MacWorld just announced that Google Latitude had finally been released
for the iPhone, but as a web-app as opposed to a proprietary app
downloaded from the App Store. See here for details: http://www.macworld.com/article/141891/2009/07/google_latitude_iphone.html

The browser-based model is much more in line with Google's vision, I
think. There are a lot of apps in the app store that would be more
appropriate as web apps. Also, Safari would be able to relay location
to Google with a higher frequency than opening an installed app, since
the apps only run while they are open, and the browser would be active
more often, e.g. when using Google Reader.