I picked up The Orange Box yesterday, and I played it for a few hours (mostly Portal, with a round or two of Team Fortress 2).

I have decided that I love it (especially Portal), but I "caught" my wife (via xbox.com) playing it before she left for work this morning.  Maybe The Orange Box (or at least Portal) is one of those games that wives and girlfriends will play?

These are actual Instant Messages from her:

Heather says (10:53 AM):
this game is cool
but, i'm lost

Heather says (10:55 AM):
i have this gun that makes portals
but, i'm so lost
one big circle

Heather says (11:04 AM):
i'm stuck
i am near a pit
and i see the door w/ an arrow
and a fenced off thing
i look ahead and there are steps
and i can't jump and reach next platform where elevator is

Heather says (11:08 AM):
oh
i shot the camera
and it made an orange portal
aah
forget that
it said don't destroy it

Heather says (11:12 AM):
i even did a portal thru the floor
and i'm stuck

Heather says (11:16 AM):
what the heck is team fortress
ha ha
looks like a disney movie

Heather says (11:17 AM):
ha ha
i died
this looks fun

Heather says (11:18 AM):
ha ha
i died
again