Just a quick note to say that the new version of LinkedIn for iPhone is now live in the iTunes App Store.

Download LinkedIn for iPhone

I wrote a fairly lengthy piece on the official LinkedIn blog, so no need to replicate the full walk-through here.  In any case, check out this new home screen:

This application represents a huge achievement for the team.  It’s really a complete redesign and re-architecture of the entire stack supporting the application, based on an end-to-end design that was driven by user feedback and business metrics.

Building iPhone apps is a wonderful throwback in some ways to the days of client software, except with the advantage of over a decade and a half of web-based architectures.  There is a richness to client applications that the web still doesn’t replicate, and a complexity and depth to their design that is often under-appreciated.

Of course, the team had fun too.  The “Themes” feature, for example, was never part of the original plan.  It was originally a last minute easter egg that we included for fun in internal testing.  It proved so popular, however, we felt like we had to include it for everyone.

There are hundreds of things I love about this new application.  Even the way it presents a user’s profile is thoughtful, as LinkedIn is designed to allow you to put your best foot forward as a professional:

Of course, I wouldn’t be a product manager if I didn’t also have hundreds of things I’d like to see improved in the application.  It has been fun to watch the Twitter stream all day, as the feedback has been mostly positive.  Still, while this application represents a big leap forward for LinkedIn on the iPhone, it’s really just a beginning.  What’s most exciting about the architecture of this application is that it will let us rapidly innovate and improve the mobile experience through 2010 and beyond.

So here’s a quick shout out to the team – thank you for the hard work and effort in 2009 to produce an iPhone app we can be proud of.   I couldn’t be more excited for 2010, as we change the way people think of mobile business applications.