Is Tumblr working on a secret yet-to-be-revealed project called Seltzer?

Tumblr Seltzer

Tumblr is continuing its rise in the social media ranks, with milestones such as President Obama’s campaign for 2012 experimenting with the platform.

Now, it appears Tumblr is getting ready to roll out something new called Seltzer.

Several private domain name registrations were made this week through the brand protection and domain management company MarkMonitor, that hint at something new like

The domain registrations include,,, and even

While Tumblr Inc has a record of using to purchase domain names, it may be using MarkMonitor in hopes of keeping future projects a secret until they are officially released.  MarkMonitor is used by several of the social media heavyweights including Google and Facebook.