Google has partnered with popular iOS news reader Flipboard to integrate Google+ into the product. Google+ Vice President of Product Management, Bradley Horowitz, announced as much at LeWeb London.
The discussion with Horowitz from the conference will be available here, once it has been processed.
Essentially, Flipboard users will be able to view streams from their Google+ circles as part of their news-reading experience.
Horowitz had the following to say in a Google+ post:
Thrilled to announce our partnership with Flipboard!
We've seen incredible excitement from the Developer community around G+ API's… Back in November, we began testing these API's with a number of select high-impact partners. The feedback has been invaluable… we've learned a ton and adapted accordingly.
Today, I'm pleased to announce we're adding Flipboard to this list of partners. *Flipboard told us that Google+ support was their number one requested feature.* They've done a great job of integrating Google+ content and features (including extensive support for Circles) within the context of their product. Their team is hugely talented and it's been a pleasure working with them.
I demonstrated an early beta build today – keep watching +Flipboard for more information on general availability of their Google+-enabled app. 
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Given Flipboard’s popularity among iOS users, this is a good opportunity for Google to get more people engaged with their Google+ accounts. With Google losing its presence in the iOS Maps app, it’s one more way for Google to get in front of iOS users in general. I wouldn’t go so far as to say that it makes up for the Maps situation, but at least it’s something.
It also looks better for Google+ to be present in Flipboard, among competitors like Twitter and Facebook.
Flipboard is available for Android, in beta, by the way.