"All your networks

are belong to us." That could be the

tagline for Zensify, a new iPhone app that lets you view, update, and share content from multiple social networks.

In other words, Zensify aims to take the place of standalone apps for the likes of Facebook, Twitter, and Flickr--or at least to save you the time of bopping from one to another just to read and post updates.

In addition to those three popular networks, Zensify can connect you with 12seconds, Delicious, Digg, Photobucket, and YouTube. (Support for more services is in the works, according to the developer.)

After you sign into your various accounts (a slow but one-time procedure), Zensify lists all your friends' updates in a single, scrolling timeline. It also presents a scrolling tag bar (this one along the top) so you can quickly filter the timeline based on current trends.

Then there's also the Tag Cloud view, which displays the aforementioned "trendy tags" in a word cloud. I've never been a fan, but it's definitely a neat way to sift through updates.

Zensify's Track tool lets you search all your networks, complete with modifiers for things like tags, usernames, and types of content. It also provides a handy batch of saved searches so you can quickly look for updates that have, say, photos or links, or that come from Flickr or Facebook.

Want to keep an update for future reference? Tap the star icon to mark it as a favorite. Want to post an update or photo to one or more of your own networks? Tap the Post icon. (Finally, an easy way to update Facebook and Twitter simultaneously!)

Unfortunately, while Zensify lets you share or reply to others' Twitter posts, there's no easy way to do likewise with Facebook entries. You can "tap through" to the friend's Facebook page using Zensify's integrated browser, but that's a slow and awkward process. The app really needs to add a low-level reply option.

Of course, it's technically called Zensify Preview, so a few rough edges are to be expected. As it stands, Zensify looks very promising, and I suspect avid social-networkers will like it a lot.