Yesterday we brought you our First Impressions: 3DS Operating System and Built-In Software, but we weren't able to try out the machine's built-in pedometer or the StreetPass as the consoles were tethered to desks or, even worse, human beings.

Buried in the Nintendo investors briefing came a snippet from Satoru Iwata talking about two miniature built-in StreetPass games.

If you're not sure what StreetPass is, it's the 3DS console's automatic ability to exchange information with other 3DS users even when just walking past them. Super Street Fighter IV 3D Edition uses the mode to carry out figurine battles on-the-go, and Dead or Alive: Dimensions, Nintendogs + Cats and Pro Evolution Soccer 2011 3D will all use the feature in different ways.

When you pass another user in StreetPass mode, your Mii characters will automatically hop across to the other player's console, appearing in the StreetPass Mii Plaza. In Iwata's words:

In short, this software enables you to enjoy collecting various Mii characters by passing other Nintendo 3DS users. We have added two small games you can easily play. One is the game called "StreetPass Quest."

While Iwata didn't give any further information about the game, he did reveal it's become quite the social success inside Nintendo, with many developers carrying prototype consoles just to test out this feature.

Many of them even go back and forth in the building, without any business purpose, to collect as many Mii characters as possible or secretly check their Nintendo 3DS during meetings. In fact, I am also one of them.

Oh Iwata, you sneaky dog.