It’s been a long time coming but it’s finally happened, Facebook has gone public on NASDAQ and is offering 421,233,615 shares to investors. Updated.

As you can imagine, there’s quite a party going down at Facebook’s Menlo Park headquarters, with thousands of employees sharing their experiences directly on the social network, but also via one of its newest acquisitions — Instagram.

Thanks to Instagram’s API and Spots.io, we can see every photo that the guys and girls at Facebook are posting to the image sharing service, in almost real-time.

Take a look for yourself.

Screen Shot 2012 05 18 at 16.16.52 520x392 See all the photos Facebook employees are posting to Instagram on IPO day

If you’re so inclined, you can subscribe to an RSS feed for the location, so you can be notified of the latest Instagram photos shared from Facebook’s California campus.

Instagram might not officially be a Facebook property (it’s facing a longer than expected wait thanks to an FTC probe), but its employees are already big fans of the app.

If you want a good look at what they are sharing without having to subscribe to individual updates, this has to be the easiest way.

Update: If you’re looking for an alternative, as Spots.io seems to have overloaded, check out this gallery at Instabam.