Six months after Facebook came out with a version of its social network for the iPhone, LinkedIn is finally coming around to releasing a mobile version of its own.

It is live now. Just go to http://m.linkedin.com/ on any mobile browser. Of course, if you have an iPhone, you will see a version optimized just for that device.

This isn’t exactly what we had in mind when we noted there is still an opportunity to create a kick-ass mobile social network.

But the basic functionality is all there. You can look up people”s profiles, invite people into your network, and see updates from your contacts. More fully-featured, downloadable mobile apps geared to specific phones may be coming in the future.

Even limited mobile browser accessibility should help LinkedIn keep its members happy. The regular Website has been on a tear lately, nearly tripling in unique visitors over the past year in the U.S., to 3.6 million in January 2008, according to comScore.

No signs of social networking fatigue there.