Zite follows Flipboard releases app for iPhone

Hot on the heels of Flipboard for iPhone and Google Currents, another content hub is expanding its reach. Zite, previously an iPad exclusive, has released its first iPhone app.

Zite is like Pandora for news, in that it learns as you use it. If you like something, give it a thumbs up; if you don’t like an article or a source, give it a thumbs down. You can log in with your Twitter or Google Reader account to help it better learn your preferences.
While your own feeds will be integrated, dont expect to use Zite as an RSS or Twitter browser. Added sources will be blended in with Zite’s, and there is no way to separate them. It’s great for finding new sources, but is unable to isolate your sources.
Categorization plays a bigger role in Zite. Rather than just breaking feeds down into general categories (news, technology, sports), each of those categories is broken down further. Technology, for example, gives you more specific categories like Android, iPhone, Mac news, Gadgets, Sci-tech, and Mobile.
Otherwise, much is like Flipboard: feeds are of high quality, they are presented in a clean and attractive layout, and the app makes the transition to the small screen beautifully.
Who knew this would become the week of the digital content hub? It’s likely that Flipboard’s iPhone launch spurred the release of Currents and Zite for iPhone. Perhaps the apps were already in their final stages, and the developers opted to release before readers all settle into Flipboard.
Which service you choose will depend on what you are looking for. Flipboard has the most customization, Zite is best at introducing new content, and Current shows trending topics.